diff --git a/servers/boe-server-all/src/main/java/com/xboe/module/boecase/service/impl/CaseKnowledgeServiceImpl.java b/servers/boe-server-all/src/main/java/com/xboe/module/boecase/service/impl/CaseKnowledgeServiceImpl.java
index a68ee754..ecb96933 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/module/boecase/service/impl/CaseKnowledgeServiceImpl.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/module/boecase/service/impl/CaseKnowledgeServiceImpl.java
@@ -205,7 +205,8 @@ public class CaseKnowledgeServiceImpl implements ICaseKnowledgeService {
             }
         }
 
-        builder.addTextBody("fileMetaData", fileMetaData.toJSONString(), ContentType.TEXT_PLAIN);
+        ContentType contentType = ContentType.create("text/plain", StandardCharsets.UTF_8);
+        builder.addTextBody("fileMetaData", fileMetaData.toJSONString(), contentType);
         requestBody.put("fileMetaData", fileMetaData);
         // 由于接口权限，目前采用不回调，而是通过批处理的方式，处理文件状态
         if (caseAiProperties.isFileUploadUseCallback()) {
@@ -542,7 +543,8 @@ public class CaseKnowledgeServiceImpl implements ICaseKnowledgeService {
             }
         }
 
-        builder.addTextBody("fileMetaData", fileMetaData.toJSONString(), ContentType.TEXT_PLAIN);
+        ContentType contentType = ContentType.create("text/plain", StandardCharsets.UTF_8);
+        builder.addTextBody("fileMetaData", fileMetaData.toJSONString(), contentType);
         requestBody.put("fileMetaData", fileMetaData);
         // 由于接口权限，目前采用不回调，而是通过批处理的方式，处理文件状态
         if (caseAiProperties.isFileUploadUseCallback()) {
@@ -856,7 +858,8 @@ public class CaseKnowledgeServiceImpl implements ICaseKnowledgeService {
             }
         }
 
-        builder.addTextBody("fileMetaData", fileMetaData.toJSONString(), ContentType.TEXT_PLAIN);
+        ContentType contentType = ContentType.create("text/plain", StandardCharsets.UTF_8);
+        builder.addTextBody("fileMetaData", fileMetaData.toJSONString(), contentType);
         requestBody.put("fileMetaData", fileMetaData);
         // 由于接口权限，目前采用不回调，而是通过批处理的方式，处理文件状态
         if (caseAiProperties.isFileUploadUseCallback()) {