diff --git a/SConstruct b/SConstruct
index c88498f..3f6886c 100644
--- a/SConstruct
+++ b/SConstruct
@@ -2,6 +2,15 @@ import os
 import sys
 import rtconfig
 
+# 增加参数 --custom  EDU_Training
+AddOption(
+    "--custom",
+    dest="custom",
+    type="string",
+    help="Specify the custom version, Edu_training etc.",
+)
+
+
 if os.getenv('RTT_ROOT'):
     RTT_ROOT = os.getenv('RTT_ROOT')
 else:
@@ -30,6 +39,10 @@ env = Environment(tools = ['mingw'],
     LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
+if GetOption("custom") == "EDU_Training":
+    env.Append(CPPDEFINES=["EDU_TRAINING"])
+    print("Custom version: " + GetOption("custom"))
+
 if rtconfig.PLATFORM in ['iccarm']:
     env.Replace(CCCOM = ['$CC $CFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
     env.Replace(ARFLAGS = [''])