diff --git a/.env.example b/.env.example
index d498e7c45..6d986ae91 100644
--- a/.env.example
+++ b/.env.example
@@ -170,3 +170,15 @@ INIT_EMBEDDING_MODEL_ID=builtin:nomic-embed-text:768
 # Rerank模型的API密钥，如果需要身份验证，可以设置
 # 支持第三方模型服务的API密钥
 # INIT_RERANK_MODEL_API_KEY=your_rerank_model_api_key
+
+# VLM_MODEL_NAME 使用的多模态模型名称
+# 用于解析图片数据
+# VLM_MODEL_NAME=your_vlm_model_name
+
+# VLM_MODEL_BASE_URL 使用的多模态模型访问地址
+# 支持第三方模型服务的URL
+# VLM_MODEL_BASE_URL=your_vlm_model_base_url
+
+# VLM_MODEL_API_KEY 使用的多模态模型API密钥
+# 支持第三方模型服务的API密钥
+# VLM_MODEL_API_KEY=your_vlm_model_api_key
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
index 84e8e71fd..9521ae6f3 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -100,6 +100,7 @@ services:
       - COS_ENABLE_OLD_DOMAIN=${COS_ENABLE_OLD_DOMAIN}
       - VLM_MODEL_BASE_URL=${VLM_MODEL_BASE_URL}
       - VLM_MODEL_NAME=${VLM_MODEL_NAME}
+      - VLM_MODEL_API_KEY=${VLM_MODEL_API_KEY}
     networks:
       - WeKnora-network
     restart: unless-stopped
diff --git a/services/docreader/src/parser/caption.py b/services/docreader/src/parser/caption.py
index 7c9cae0f2..6d7f8b3dc 100644
--- a/services/docreader/src/parser/caption.py
+++ b/services/docreader/src/parser/caption.py
@@ -177,6 +177,7 @@ class Caption:
             return
         self.completion_url = os.getenv("VLM_MODEL_BASE_URL") + "/v1/chat/completions"
         self.model = os.getenv("VLM_MODEL_NAME")
+        self.api_key = os.getenv("VLM_MODEL_API_KEY")
         logger.info(
             f"Service configured with model: {self.model}, endpoint: {self.completion_url}"
         )
@@ -218,6 +219,8 @@ class Caption:
             "Cache-Control": "no-cache",
             "Connection": "keep-alive",
         }
+        if self.api_key:
+            headers["Authorization"] = f"Bearer {self.api_key}"
 
         try:
             logger.info(f"Sending request to Caption API with model: {self.model}")