diff --git a/test-test/src/main/java/com/test/test/service/impl/TestTaskCaseServiceImpl.java b/test-test/src/main/java/com/test/test/service/impl/TestTaskCaseServiceImpl.java
index 7fdadfd..322cce4 100644
--- a/test-test/src/main/java/com/test/test/service/impl/TestTaskCaseServiceImpl.java
+++ b/test-test/src/main/java/com/test/test/service/impl/TestTaskCaseServiceImpl.java
@@ -49,7 +49,11 @@ public class TestTaskCaseServiceImpl implements ITestTaskCaseService {
      */
     @Override
     public int insertTestTaskCase(TestTaskCase testTaskCase) {
-        testTaskCase.setSort(testTaskCaseMapper.max(testTaskCase.getTaskId()) + 1);
+        Long max = testTaskCaseMapper.max(testTaskCase.getTaskId());
+        if (max == null) {
+            max = 0L;
+        }
+        testTaskCase.setSort(max + 1);
         return testTaskCaseMapper.insertTestTaskCase(testTaskCase);
     }