diff --git a/backend/scripts/run_parallel_simulation.py b/backend/scripts/run_parallel_simulation.py
index 2a627ff..d72f8e3 100644
--- a/backend/scripts/run_parallel_simulation.py
+++ b/backend/scripts/run_parallel_simulation.py
@@ -1027,7 +1027,7 @@ def create_model(config: Dict[str, Any], use_boost: bool = False):
         raise ValueError("缺少 API Key 配置，请在项目根目录 .env 文件中设置 LLM_API_KEY")
     
     if llm_base_url:
-        os.environ["OPENAI_API_BASE_URL"] = llm_base_url
+        os.environ["OPENAI_BASE_URL"] = llm_base_url
     
     print(f"{config_label} model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")
     
diff --git a/backend/scripts/run_reddit_simulation.py b/backend/scripts/run_reddit_simulation.py
index 14907cb..d857a5b 100644
--- a/backend/scripts/run_reddit_simulation.py
+++ b/backend/scripts/run_reddit_simulation.py
@@ -457,7 +457,7 @@ class RedditSimulationRunner:
             raise ValueError("缺少 API Key 配置，请在项目根目录 .env 文件中设置 LLM_API_KEY")
         
         if llm_base_url:
-            os.environ["OPENAI_API_BASE_URL"] = llm_base_url
+            os.environ["OPENAI_BASE_URL"] = llm_base_url
         
         print(f"LLM配置: model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")
         
diff --git a/backend/scripts/run_twitter_simulation.py b/backend/scripts/run_twitter_simulation.py
index caab9e9..2703529 100644
--- a/backend/scripts/run_twitter_simulation.py
+++ b/backend/scripts/run_twitter_simulation.py
@@ -450,7 +450,7 @@ class TwitterSimulationRunner:
             raise ValueError("缺少 API Key 配置，请在项目根目录 .env 文件中设置 LLM_API_KEY")
         
         if llm_base_url:
-            os.environ["OPENAI_API_BASE_URL"] = llm_base_url
+            os.environ["OPENAI_BASE_URL"] = llm_base_url
         
         print(f"LLM配置: model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")