diff --git a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/RagHttpService.java b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/RagHttpService.java
index e500727ad..bff17c878 100644
--- a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/RagHttpService.java
+++ b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/RagHttpService.java
@@ -304,6 +304,7 @@ public class RagHttpService {
 
                 // 构建请求参数
                 HttpResponse<String> response = Unirest.post(ragEmbed)
+                        .header("Content-Type", "multipart/form-data")
                         .field("file_id", fileId)
                         .field("file", reqVO.getFileInputStream(), fileName)
                         .asString();