diff --git a/pmapi/src/main/java/com/ningdatech/pmapi/todocenter/manage/TodoCenterManage.java b/pmapi/src/main/java/com/ningdatech/pmapi/todocenter/manage/TodoCenterManage.java
index 4b9472e..aee7e21 100644
--- a/pmapi/src/main/java/com/ningdatech/pmapi/todocenter/manage/TodoCenterManage.java
+++ b/pmapi/src/main/java/com/ningdatech/pmapi/todocenter/manage/TodoCenterManage.java
@@ -439,6 +439,10 @@ public class TodoCenterManage {
         Long projectId = request.getProjectId();
         ProcessProgressVo progressInstanceDetail = processInstanceService.getProgressInstanceDetail(nodeId, instanceId);
 
+        if(Objects.isNull(progressInstanceDetail)){
+            return null;
+        }
+
         List<ProgressNode> progressInfo = progressInstanceDetail.getProgressInfo();
         if (CollUtil.isNotEmpty(progressInfo)){
             buildUserUtils.buildUserByProcessInfo(progressInfo);