diff --git a/resources/assets/js/pages/manage/components/TaskDetail.vue b/resources/assets/js/pages/manage/components/TaskDetail.vue
index 5bfe7e290..f6510b984 100755
--- a/resources/assets/js/pages/manage/components/TaskDetail.vue
+++ b/resources/assets/js/pages/manage/components/TaskDetail.vue
@@ -1563,6 +1563,10 @@ export default {
                 this.relatedTasks = [];
                 return;
             }
+            if (this.isSubTask) {
+                this.relatedTasks = [];
+                return;
+            }
             const cacheMap = this.$store.state.taskRelatedCache || {};
             const cached = cacheMap[this.taskId];
             if (cached?.list) {
@@ -1597,6 +1601,9 @@ export default {
             if (!taskId || taskId !== this.taskId) {
                 return;
             }
+            if (this.isSubTask) {
+                return;
+            }
             this.loadRelatedTasks();
         },