diff --git a/tools/building.py b/tools/building.py
index 797ffc0076..3b85bc9930 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -22,7 +22,7 @@
 # 2015-01-20     Bernard      Add copyright information
 # 2015-07-25     Bernard      Add LOCAL_CCFLAGS/LOCAL_CPPPATH/LOCAL_CPPDEFINES for
 #                             group definition.
-#
+# 2024-04-21     Bernard      Add toolchain detection in sdk packages
 
 import os
 import sys
@@ -37,7 +37,6 @@ from utils import _make_path_relative
 from mkdist import do_copy_file
 from options import AddOptions
 
-
 BuildOptions = {}
 Projects = []
 Rtt_Root = ''
@@ -201,6 +200,22 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
             # del the 'RTT_EXEC_PATH' and using the 'EXEC_PATH' setting on rtconfig.py
             del os.environ['RTT_EXEC_PATH']
 
+        try:
+            # try to detect toolchains in env
+            from utils import ImportModule
+            envm = ImportModule('env')
+            # from env import GetSDKPath
+            exec_path = envm.GetSDKPath(rtconfig.CC)
+            if 'gcc' in rtconfig.CC:
+                exec_path = os.path.join(exec_path, 'bin')
+                if os.path.exists(exec_path):
+                    print('set CC to ' + exec_path)
+                    rtconfig.EXEC_PATH = exec_path
+                    os.environ['RTT_EXEC_PATH'] = exec_path
+        except Exception as e:
+            # detect failed, ignore
+            pass
+
     exec_path = GetOption('exec-path')
     if exec_path:
         os.environ['RTT_EXEC_PATH'] = exec_path
diff --git a/tools/env.py b/tools/env.py
new file mode 100644
index 0000000000..995cfd135b
--- /dev/null
+++ b/tools/env.py
@@ -0,0 +1,55 @@
+#! /usr/bin/env python
+#coding=utf-8
+#
+# Copyright (c) 2024, RT-Thread Development Team
+#
+# SPDX-License-Identifier: GPL-2.0
+#
+# Change Logs:
+# Date           Author       Notes
+# 2024-04-20     Bernard      the first version
+
+import os
+import json
+import platform
+
+def GetEnvPath():
+    env = os.environ.get('ENV_ROOT')
+
+    if env is None:
+        if platform.system() == 'Windows':
+            return os.path.join(os.environ['USERPROFILE'], '.env')
+        else:
+            return os.path.join(os.environ['HOME'], '.env')
+
+    return env
+
+def GetSDKPackage():
+    env = GetEnvPath()
+
+    if env:
+        return os.path.join(env, 'tools', 'packages')
+
+    return None
+
+def GetSDKPath(name):
+    env = GetEnvPath()
+
+    if env:
+        #read packages.json under env/tools/packages
+        with open(os.path.join(env, 'tools', 'packages', 'pkgs.json'), 'r', encoding='utf-8') as f:
+            # packages_json = f.read()
+            packages = json.load(f)
+
+            for item in packages:
+                package_path = os.path.join(GetEnvPath(), 'packages', item['path'], 'package.json')
+                # read package['path']/package.json under env/packages
+                with open(package_path, 'r', encoding='utf-8') as f:
+                    # package_json = f.read()
+                    package = json.load(f)
+
+                    if package['name'] == name:
+                        return os.path.join(GetSDKPackage(), package['name'] + '-' + item['ver'])
+
+    # not found named package
+    return None
diff --git a/tools/utils.py b/tools/utils.py
index 2d88176417..7be58b9db9 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -20,7 +20,7 @@
 # Change Logs:
 # Date           Author       Notes
 # 2015-01-20     Bernard      Add copyright information
-#
+# 2024-04-21     Bernard      Add ImportModule to import local module
 
 import sys
 import os
@@ -291,3 +291,15 @@ def ReloadModule(module):
         importlib.reload(module)
     else:
         reload(module)
+
+def ImportModule(module):
+    import sys
+    if sys.version_info.major >= 3:
+        import importlib.util
+        path = os.path.dirname(__file__)
+        spec = importlib.util.spec_from_file_location(module, os.path.join(path, module+".py"))
+        module = importlib.util.module_from_spec(spec)
+        spec.loader.exec_module(module)
+        return module
+    else:
+        return __import__(module, fromlist=[module])