diff --git a/src/main/java/com/supervision/police/service/impl/ModelCaseServiceImpl.java b/src/main/java/com/supervision/police/service/impl/ModelCaseServiceImpl.java
index da7d8ce..1ca519c 100644
--- a/src/main/java/com/supervision/police/service/impl/ModelCaseServiceImpl.java
+++ b/src/main/java/com/supervision/police/service/impl/ModelCaseServiceImpl.java
@@ -386,8 +386,13 @@ public class ModelCaseServiceImpl extends ServiceImpl<ModelCaseMapper, ModelCase
         if (StrUtil.isEmpty(modelCase.getKnowledgeBaseId())){
             log.info("案件：{} 尚未创建知识库，即将创建知识库库...",modelCase.getCaseName());
             // 防止名称超长，在这里统一采用案件id 作为知识库名称
+            String caseDetail = modelCase.getCaseDetail();
+            if (StrUtil.length(caseDetail) > 400){
+                caseDetail = StrUtil.sub(caseDetail,0,400);
+                log.info("案件：{} 描述内容太长，已截取前400个字符",modelCase.getCaseName());
+            }
             String knowledgeBaseId = difyApiUtil.createDataset(
-                    StrUtil.join("_", "case", modelCase.getId()), modelCase.getCaseDetail());
+                    StrUtil.join("_", "case", modelCase.getId()), caseDetail);
             if (StrUtil.isEmpty(knowledgeBaseId)){
                 log.error("案件：{} 创建知识库失败...",modelCase.getCaseName());
                 return false;