diff --git a/.github/workflows/compilation_on_sgx.yml b/.github/workflows/compilation_on_sgx.yml
index 313ff0c94..aa731af2f 100644
--- a/.github/workflows/compilation_on_sgx.yml
+++ b/.github/workflows/compilation_on_sgx.yml
@@ -455,5 +455,5 @@ jobs:
         if: ${{ matrix.light == 'green' }}
         run: |
           source /opt/intel/sgxsdk/environment
-          ./test_wamr.sh -x -p -s spec -t ${{ matrix.running_mode }}
+          ./test_wamr.sh -x -p -s spec -P -t ${{ matrix.running_mode }}
         working-directory: ./tests/wamr-test-suites
diff --git a/.github/workflows/spec_test.yml b/.github/workflows/spec_test.yml
index 18a211adf..f5b4002f2 100644
--- a/.github/workflows/spec_test.yml
+++ b/.github/workflows/spec_test.yml
@@ -33,12 +33,12 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  DEFAULT_TEST_OPTIONS: "-s spec"
+  DEFAULT_TEST_OPTIONS: "-s spec -P"
   LLVM_CACHE_SUFFIX: "build-llvm_libraries_ex"
-  MULTI_MODULES_TEST_OPTIONS: "-s spec -M"
-  SIMD_TEST_OPTIONS: "-s spec -S"
-  THREADS_TEST_OPTIONS: "-s spec -p"
-  X86_32_TARGET_TEST_OPTIONS: "-m x86_32"
+  MULTI_MODULES_TEST_OPTIONS: "-s spec -M -P"
+  SIMD_TEST_OPTIONS: "-s spec -S -P"
+  THREADS_TEST_OPTIONS: "-s spec -p -P"
+  X86_32_TARGET_TEST_OPTIONS: "-m x86_32 -P"
 
 jobs:
   cancel_previous:
diff --git a/tests/wamr-test-suites/spec-test-script/all.py b/tests/wamr-test-suites/spec-test-script/all.py
new file mode 100644
index 000000000..69bd4c92b
--- /dev/null
+++ b/tests/wamr-test-suites/spec-test-script/all.py
@@ -0,0 +1,434 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019 Intel Corporation.  All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+
+import argparse
+import hashlib
+import multiprocessing as mp
+import os
+import pathlib
+import random
+import shlex
+import shutil
+import string
+import subprocess
+import sys
+import time
+
+"""
+The script itself has to be put under the same directory with the "spec".
+"""
+
+IWASM_CMD = "../../../product-mini/platforms/linux/build/iwasm"
+IWASM_SGX_CMD = "../../../product-mini/platforms/linux-sgx/enclave-sample/iwasm"
+SPEC_TEST_DIR = "spec/test/core"
+WAST2WASM_CMD = "./wabt/out/gcc/Release/wat2wasm"
+WAMRC_CMD = "../../../wamr-compiler/build/wamrc"
+
+
+class TargetAction(argparse.Action):
+    TARGET_MAP = {
+        "ARMV7_VFP": "armv7",
+        "RISCV64": "riscv64_lp64d",
+        "RISCV64_LP64": "riscv64_lp64d",
+        "RISCV64_LP64D": "riscv64_lp64",
+        "THUMBV7_VFP": "thumbv7",
+        "X86_32": "i386",
+        "X86_64": "x86_64",
+    }
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        setattr(namespace, self.dest, self.TARGET_MAP.get(values, "x86_64"))
+
+
+def ignore_the_case(
+    case_name,
+    target,
+    aot_flag=False,
+    sgx_flag=False,
+    multi_module_flag=False,
+    reference_type_flag=True,
+    simd_flag=False,
+):
+    if case_name in ["comments", "inline-module", "names"]:
+        return True
+
+    if not multi_module_flag and case_name in ["imports", "linking"]:
+        return True
+
+    if "i386" == target and case_name in ["float_exprs"]:
+        return True
+
+    if sgx_flag:
+        if case_name in ["conversions", "f32_bitwise", "f64_bitwise"]:
+            return True
+
+        if aot_flag and case_name in [
+            "call_indirect",
+            "call",
+            "fac",
+            "skip-stack-guard-page",
+        ]:
+            return True
+
+    return False
+
+
+def preflight_check(aot_flag):
+    if not pathlib.Path(SPEC_TEST_DIR).resolve().exists():
+        print(f"Can not find {SPEC_TEST_DIR}")
+        return False
+
+    if not pathlib.Path(WAST2WASM_CMD).resolve().exists():
+        print(f"Can not find {WAST2WASM_CMD}")
+        return False
+
+    if aot_flag and not pathlib.Path(WAMRC_CMD).resolve().exists():
+        print(f"Can not find {WAMRC_CMD}")
+        return False
+
+    return True
+
+
+def test_case(
+    case_path,
+    target,
+    aot_flag=False,
+    sgx_flag=False,
+    multi_module_flag=False,
+    reference_type_flag=True,
+    simd_flag=False,
+    clean_up_flag=True,
+    verbose_flag=True,
+):
+    case_path = pathlib.Path(case_path).resolve()
+    case_name = case_path.stem
+
+    if ignore_the_case(
+        case_name,
+        target,
+        aot_flag,
+        sgx_flag,
+        multi_module_flag,
+        reference_type_flag,
+        simd_flag,
+    ):
+        return True
+
+    CMD = ["python2.7", "runtest.py"]
+    CMD.append("--wast2wasm")
+    CMD.append(WAST2WASM_CMD)
+    CMD.append("--interpreter")
+    CMD.append(IWASM_CMD if not sgx_flag else IWASM_SGX_CMD)
+    CMD.append("--aot-compiler")
+    CMD.append(WAMRC_CMD)
+
+    if aot_flag:
+        CMD.append("--aot")
+        CMD.append("--aot-target")
+        CMD.append(target)
+
+    if reference_type_flag:
+        CMD.append("--ref_types")
+
+    if sgx_flag:
+        CMD.append("--sgx")
+
+    if simd_flag:
+        CMD.append("--simd")
+
+    if not clean_up_flag:
+        CMD.append("--no_cleanup")
+
+    CMD.append(case_path)
+    print(f"============> run {case_name} ", end="")
+    with subprocess.Popen(
+        CMD,
+        bufsize=1,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        universal_newlines=True,
+    ) as p:
+        try:
+            case_last_words = []
+            while not p.poll():
+                output = p.stdout.readline()
+
+                if not output:
+                    break
+
+                if verbose_flag:
+                    print(output, end="")
+                else:
+                    if len(case_last_words) == 16:
+                        case_last_words.pop(0)
+                    case_last_words.append(output)
+
+            p.wait(60)
+
+            if p.returncode:
+                print(f"failed with a non-zero return code {p.returncode}")
+                if not verbose_flag:
+                    print(
+                        f"\n==================== LAST LOG of {case_name} ====================\n"
+                    )
+                    print("".join(case_last_words))
+                    print("\n==================== LAST LOG END ====================\n")
+                raise Exception(case_name)
+            else:
+                print("successful")
+                return True
+        except subprocess.CalledProcessError:
+            print("failed with CalledProcessError")
+            raise Exception(case_name)
+        except subprocess.TimeoutExpired:
+            print("failed with TimeoutExpired")
+            raise Exception(case_name)
+
+
+def test_suite(
+    target,
+    aot_flag=False,
+    sgx_flag=False,
+    multi_module_flag=False,
+    reference_type_flag=True,
+    simd_flag=False,
+    clean_up_flag=True,
+    verbose_flag=True,
+):
+    suite_path = pathlib.Path(SPEC_TEST_DIR).resolve()
+    if not suite_path.exists():
+        print(f"can not find spec test cases at {suite_path}")
+        return False
+
+    case_list = sorted(suite_path.glob("**/*.wast"))
+    case_count = len(case_list)
+    failed_case = 0
+    successful_case = 0
+    for case_path in case_list:
+        try:
+            test_case(
+                str(case_path),
+                target,
+                aot_flag,
+                sgx_flag,
+                multi_module_flag,
+                reference_type_flag,
+                simd_flag,
+                clean_up_flag,
+                verbose_flag,
+            )
+            successful_case += 1
+        except Exception:
+            failed_case += 1
+            break
+
+    print(
+        f"IN ALL {case_count} cases: {successful_case} PASS, {failed_case} FAIL, {case_count - successful_case - failed_case} SKIP"
+    )
+
+    return 0 == failed_case
+
+
+def test_suite_parallelly(
+    target,
+    aot_flag=False,
+    sgx_flag=False,
+    multi_module_flag=False,
+    reference_type_flag=True,
+    simd_flag=False,
+    clean_up_flag=False,
+    verbose_flag=False,
+):
+
+    suite_path = pathlib.Path(SPEC_TEST_DIR).resolve()
+    if not suite_path.exists():
+        print(f"can not find spec test cases at {suite_path}")
+        return False
+
+    case_list = sorted(suite_path.glob("**/*.wast"))
+    case_count = len(case_list)
+    failed_case = 0
+    successful_case = 0
+    print(f"----- Run the whole spec test suite on {mp.cpu_count()} cores -----")
+    with mp.Pool() as pool:
+        results = {}
+        for case_path in case_list:
+            results[case_path.stem] = pool.apply_async(
+                test_case,
+                [
+                    str(case_path),
+                    target,
+                    aot_flag,
+                    sgx_flag,
+                    multi_module_flag,
+                    reference_type_flag,
+                    simd_flag,
+                    clean_up_flag,
+                    verbose_flag,
+                ],
+            )
+
+        for case_name, result in results.items():
+            try:
+                # 5 min / case
+                result.wait(300)
+                if not result.successful():
+                    failed_case += 1
+                else:
+                    successful_case += 1
+            except mp.TimeoutError:
+                print(f"{case_name} meets TimeoutError")
+                failed_case += 1
+
+    print(
+        f"IN ALL {case_count} cases: {successful_case} PASS, {failed_case} FAIL, {case_count - successful_case - failed_case} SKIP"
+    )
+
+    return 0 == failed_case
+
+
+def main():
+    parser = argparse.ArgumentParser(description="run the whole spec test suite")
+
+    parser.add_argument(
+        "-M",
+        action="store_true",
+        default=False,
+        dest="multi_module_flag",
+        help="Running with the Multi-Module feature",
+    )
+    parser.add_argument(
+        "-m",
+        action=TargetAction,
+        choices=list(TargetAction.TARGET_MAP.keys()),
+        type=str,
+        dest="target",
+        default="X86_64",
+        help="Specify Target ",
+    )
+    parser.add_argument(
+        "-r",
+        action="store_true",
+        default=False,
+        dest="reference_type_flag",
+        help="Running with the Reference-type feature",
+    )
+    parser.add_argument(
+        "-S",
+        action="store_true",
+        default=False,
+        dest="simd_flag",
+        help="Running with the SIMD feature",
+    )
+    parser.add_argument(
+        "-t",
+        action="store_true",
+        default=False,
+        dest="aot_flag",
+        help="Running with AOT mode",
+    )
+    parser.add_argument(
+        "-x",
+        action="store_true",
+        default=False,
+        dest="sgx_flag",
+        help="Running with SGX environment",
+    )
+    parser.add_argument(
+        "--parl",
+        action="store_true",
+        default=False,
+        dest="parl_flag",
+        help="To run whole test suite parallelly",
+    )
+    parser.add_argument(
+        "--no_clean_up",
+        action="store_false",
+        default=True,
+        dest="clean_up_flag",
+        help="Does not remove tmpfiles. But it will be enabled while running parallelly",
+    )
+    parser.add_argument(
+        "--quiet",
+        action="store_false",
+        default=True,
+        dest="verbose_flag",
+        help="Close real time output while running cases, only show last words of failed ones",
+    )
+    parser.add_argument(
+        "cases",
+        metavar="path_to__case",
+        type=str,
+        nargs="*",
+        help=f"Specify all wanted cases. If not the script will go through all cases under {SPEC_TEST_DIR}",
+    )
+
+    options = parser.parse_args()
+    print(options)
+
+    if not preflight_check(options.aot_flag):
+        return False
+
+    if not options.cases:
+        if options.parl_flag:
+            # several cases might share the same workspace/tempfile at the same time
+            # so, disable it while running parallelly
+            options.clean_up_flag = False
+            options.verbose_flag = False
+
+            start = time.time_ns()
+            ret = test_suite_parallelly(
+                options.target,
+                options.aot_flag,
+                options.sgx_flag,
+                options.multi_module_flag,
+                options.reference_type_flag,
+                options.simd_flag,
+                options.clean_up_flag,
+                options.verbose_flag,
+            )
+            end = time.time_ns()
+            print(
+                f"It takes {((end - start) / 1000000):,} ms to run test_suite_parallelly"
+            )
+        else:
+            start = time.time_ns()
+            ret = test_suite(
+                options.target,
+                options.aot_flag,
+                options.sgx_flag,
+                options.multi_module_flag,
+                options.reference_type_flag,
+                options.simd_flag,
+                options.clean_up_flag,
+                options.verbose_flag,
+            )
+            end = time.time_ns()
+            print(f"It takes {((end - start) / 1000000):,} ms to run test_suite")
+    else:
+        try:
+            for case in options.cases:
+                test_case(
+                    case,
+                    options.target,
+                    options.aot_flag,
+                    options.sgx_flag,
+                    options.multi_module_flag,
+                    options.reference_type_flag,
+                    options.simd_flag,
+                    options.clean_up_flag,
+                    options.verbose_flag,
+                )
+            else:
+                ret = True
+        except Exception:
+            ret = False
+
+    return ret
+
+
+if __name__ == "__main__":
+    sys.exit(0 if main() else 1)
diff --git a/tests/wamr-test-suites/spec-test-script/runtest.py b/tests/wamr-test-suites/spec-test-script/runtest.py
index 2e378e8b7..0fb5b7848 100755
--- a/tests/wamr-test-suites/spec-test-script/runtest.py
+++ b/tests/wamr-test-suites/spec-test-script/runtest.py
@@ -1075,6 +1075,7 @@ if __name__ == "__main__":
     if test_aot:
         (t3fd, aot_tempfile) = tempfile.mkstemp(suffix=".aot")
 
+    ret_code = 0
     try:
         log("################################################")
         log("### Testing %s" % opts.test_file.name)
@@ -1262,9 +1263,10 @@ if __name__ == "__main__":
                 raise Exception("unrecognized form '%s...'" % form[0:40])
     except Exception as e:
         traceback.print_exc()
-        raise Exception("catch an exception {}".format(e))
+        print("THE FINAL EXCEPTION IS {}".format(e))
+        ret_code = 101
     else:
-        sys.exit(0)
+        ret_code = 0
     finally:
         if not opts.no_cleanup:
             log("Removing tempfiles")
@@ -1285,3 +1287,5 @@ if __name__ == "__main__":
             log("### End testing %s" % opts.test_file.name)
         else:
             log("Leaving tempfiles: %s" % ([wast_tempfile, wasm_tempfile]))
+
+        sys.exit(ret_code)
diff --git a/tests/wamr-test-suites/test_wamr.sh b/tests/wamr-test-suites/test_wamr.sh
index ca34c6287..6bf665448 100755
--- a/tests/wamr-test-suites/test_wamr.sh
+++ b/tests/wamr-test-suites/test_wamr.sh
@@ -13,14 +13,15 @@ DEBUG set -xEevuo pipefail
 function help()
 {
     echo "test_wamr.sh [options]"
-    echo "-s {suite_name} test only one suite (spec)"
     echo "-c clean previous test results, not start test"
     echo "-b use the wabt binary release package instead of compiling from the source code"
-    echo "-t set compile type of iwasm(classic-interp\fast-interp\jit\aot)"
-    echo "-m set compile target of iwasm(x86_64\x86_32\armv7_vfp\thumbv7_vfp\riscv64_lp64d\riscv64_lp64)"
     echo "-M enable the multi module feature"
+    echo "-m set compile target of iwasm(x86_64\x86_32\armv7_vfp\thumbv7_vfp\riscv64_lp64d\riscv64_lp64)"
+    echo "-P run the spec test parallelly"
     echo "-p enable multi thread feature"
     echo "-S enable SIMD"
+    echo "-s {suite_name} test only one suite (spec)"
+    echo "-t set compile type of iwasm(classic-interp\fast-interp\jit\aot)"
     echo "-x test SGX"
 }
 
@@ -41,8 +42,9 @@ SGX_OPT=""
 # as they are finished and merged into spec
 ENABLE_REF_TYPES=1
 PLATFORM=$(uname -s | tr A-Z a-z)
+PARALLELISM=0
 
-while getopts ":s:cabt:m:MCpSxr" opt
+while getopts ":s:cabt:m:MCpSxP" opt
 do
     OPT_PARSED="TRUE"
     case $opt in
@@ -114,6 +116,9 @@ do
         echo "test SGX"
         SGX_OPT="--sgx"
         ;;
+        P)
+        PARALLELISM=1
+        ;;
         ?)
         help
         exit 1;;
@@ -307,12 +312,6 @@ function spec_test()
 
         git fetch simd
         git checkout simd/main -- test/core/simd
-        git checkout simd/main -- interpreter
-
-        echo "compile the reference intepreter"
-        pushd interpreter
-        make opt -j 4
-        popd
 
         git apply ../../spec-test-script/simd_ignore_cases.patch
     fi
@@ -362,7 +361,7 @@ function spec_test()
         make -C wabt gcc-release -j 4
     fi
 
-    ln -sf ${WORK_DIR}/../spec-test-script/all.sh .
+    ln -sf ${WORK_DIR}/../spec-test-script/all.py .
     ln -sf ${WORK_DIR}/../spec-test-script/runtest.py .
 
     local ARGS_FOR_SPEC_TEST=""
@@ -398,8 +397,12 @@ function spec_test()
         ARGS_FOR_SPEC_TEST+="-t -m ${TARGET} "
     fi
 
+    if [[ ${PARALLELISM} == 1 ]]; then
+        ARGS_FOR_SPEC_TEST+="--parl "
+    fi
+
     cd ${WORK_DIR}
-    ./all.sh ${ARGS_FOR_SPEC_TEST} | tee -a ${REPORT_DIR}/spec_test_report.txt
+    python3 ./all.py ${ARGS_FOR_SPEC_TEST} | tee -a ${REPORT_DIR}/spec_test_report.txt
     [[ ${PIPESTATUS[0]} -ne 0 ]] && exit 1
     cd -