diff --git a/common/tool.py b/common/tool.py
index 96e49d13..1a03f949 100644
--- a/common/tool.py
+++ b/common/tool.py
@@ -1235,6 +1235,8 @@ def parse_env(env_string, stdio=None):
     @staticmethod
     def parse_env_display(env_list):
         env_dict = {}
+        if not env_list:
+            return {}
         for env_string in env_list:
             # 分割键和值
             key_value = env_string.split('=', 1)