diff --git a/business/views.py b/business/views.py
index e7417dd..86ef220 100644
--- a/business/views.py
+++ b/business/views.py
@@ -5153,12 +5153,14 @@ class deleteSystem(APIView):
 class ExportCaseLogExcel(APIView):
     def post(self, request, *args, **kwargs):
         """
-        导出指定案件的日志到Excel
+        导出指定案件的日志到Excel，上传到OSS并返回下载链接
         必填参数：case_id（案件ID）
         可选参数：start_time（开始时间）、end_time（结束时间）
+        返回：下载链接
         """
         import pandas as pd
-        from django.http import HttpResponse
+        import oss2
+        import uuid
         from io import BytesIO
         
         case_id = request.data.get('case_id')
@@ -5242,23 +5244,48 @@ class ExportCaseLogExcel(APIView):
                 '附件': file_info,
             })
         
-        # 导出Excel
+        # 生成Excel文件
         df = pd.DataFrame(excel_data)
         output = BytesIO()
         with pd.ExcelWriter(output, engine='openpyxl') as writer:
             df.to_excel(writer, index=False, sheet_name='案件日志')
-            # 调整列宽
             ws = writer.sheets['案件日志']
             for idx, col in enumerate(df.columns):
                 width = min(max(df[col].astype(str).map(len).max(), len(col)) + 2, 50)
                 ws.column_dimensions[chr(65 + idx) if idx < 26 else chr(64 + idx // 26) + chr(65 + idx % 26)].width = width
         
         output.seek(0)
-        filename = f'{case.contract_no or f"案件{case_id}"}_日志_{datetime.now().strftime("%Y%m%d%H%M%S")}.xlsx'
         
-        response = HttpResponse(output.read(), content_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
-        from urllib.parse import quote
-        response['Content-Disposition'] = f'attachment; filename*=UTF-8\'\'{quote(filename)}'
-        response['Access-Control-Expose-Headers'] = 'Content-Disposition'
-        return response
+        # 上传到阿里云OSS
+        try:
+            endpoint = 'https://oss-cn-beijing.aliyuncs.com'
+            access_key_id = "LTAI5tRMxrM95Pi8JEEmqRcg"
+            access_key_secret = "8vueGCsRVeFyQMcAA7sysO7LSnuJDG"
+            bucket_name = 'oss-bucket-yj'
+            
+            auth = oss2.Auth(access_key_id, access_key_secret)
+            bucket = oss2.Bucket(auth, endpoint, bucket_name)
+            
+            # 生成唯一文件名
+            contract_no_safe = (case.contract_no or f'case{case_id}').replace('/', '_').replace('\\', '_')
+            filename = f'{uuid.uuid4().hex[:12]}_{contract_no_safe}_日志_{datetime.now().strftime("%Y%m%d%H%M%S")}.xlsx'
+            
+            # 上传文件
+            result = bucket.put_object(filename, output.getvalue())
+            
+            if result.status == 200:
+                # 生成下载链接
+                download_url = f'https://{bucket_name}.{endpoint.replace("https://", "")}/{filename}'
+                return Response({
+                    'message': '导出成功',
+                    'code': 0,
+                    'data': {
+                        'url': download_url,
+                        'filename': f'{case.contract_no or f"案件{case_id}"}_日志.xlsx'
+                    }
+                }, status=status.HTTP_200_OK)
+            else:
+                return Response({'status': 'error', 'message': '文件上传失败', 'code': 1}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+        except Exception as e:
+            return Response({'status': 'error', 'message': f'文件上传失败: {str(e)}', 'code': 1}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 
diff --git a/query_caselog.py b/query_caselog.py
deleted file mode 100644
index ad6add0..0000000
--- a/query_caselog.py
+++ /dev/null
@@ -1,60 +0,0 @@
-import pymysql
-
-conn = pymysql.connect(
-    host='47.108.113.7',
-    port=3306,
-    user='jzls',
-    password='Ls123456',
-    database='jzls',
-    charset='utf8'
-)
-
-cursor = conn.cursor()
-
-# 查询案件日志总数
-cursor.execute('SELECT COUNT(*) FROM business_caselog WHERE is_deleted=0')
-total = cursor.fetchone()[0]
-print(f'案件日志总数: {total}')
-
-# 查询案件总数
-cursor.execute('SELECT COUNT(*) FROM business_case WHERE is_deleted=0')
-case_total = cursor.fetchone()[0]
-print(f'案件总数: {case_total}')
-
-# 查询每个案件的日志数量
-sql = """
-    SELECT c.id, c.contract_no, COUNT(l.id) as log_count
-    FROM business_case c
-    LEFT JOIN business_caselog l ON c.id = l.case_id AND l.is_deleted=0
-    WHERE c.is_deleted=0
-    GROUP BY c.id, c.contract_no
-    ORDER BY c.id
-    LIMIT 20
-"""
-cursor.execute(sql)
-
-print('\n案件日志统计（前20条）:')
-print('-' * 60)
-print(f'{"案件ID":<10}{"合同编号":<30}{"日志数量":<10}')
-print('-' * 60)
-for row in cursor.fetchall():
-    print(f'{row[0]:<10}{(row[1] or "无"):<30}{row[2]:<10}')
-
-# 查询最近10条日志
-print('\n最近10条案件日志:')
-print('-' * 80)
-sql2 = """
-    SELECT l.id, l.case_id, l.content, l.times, l.username
-    FROM business_caselog l
-    WHERE l.is_deleted=0
-    ORDER BY l.id DESC
-    LIMIT 10
-"""
-cursor.execute(sql2)
-for row in cursor.fetchall():
-    content = (row[2][:30] + '...') if row[2] and len(row[2]) > 30 else row[2]
-    print(f'日志ID:{row[0]}, 案件ID:{row[1]}, 时间:{row[3]}, 记录人:{row[4]}')
-    print(f'  内容: {content}')
-
-cursor.close()
-conn.close()