diff --git a/backend/src/main/java/com/designhub/service/TaskItemService.java b/backend/src/main/java/com/designhub/service/TaskItemService.java
index 6189180..56240ed 100644
--- a/backend/src/main/java/com/designhub/service/TaskItemService.java
+++ b/backend/src/main/java/com/designhub/service/TaskItemService.java
@@ -1099,9 +1099,23 @@ public class TaskItemService {
                         }
                     }
                     
-                    // 主任务的任务类型信息（显示一级分类如"新品"、"优化"）
+                    // 主任务的任务类型信息
                     groupInfo.put("taskTypeId", mainTask.getTaskTypeId());
-                    if (mainTask.getTaskTypeId() != null) {
+                    // 使用taskSubType显示一级分类（新品/优化/改图等）
+                    String taskSubType = mainTask.getTaskSubType();
+                    if (taskSubType != null && !taskSubType.isEmpty()) {
+                        // 转换为中文显示
+                        String taskTypeName = switch (taskSubType) {
+                            case "new" -> "新品";
+                            case "optimize" -> "优化";
+                            case "redesign" -> "改图";
+                            case "other" -> "其他";
+                            default -> taskSubType;
+                        };
+                        groupInfo.put("taskTypeName", taskTypeName);
+                        groupInfo.put("taskSubType", taskSubType);
+                    } else if (mainTask.getTaskTypeId() != null) {
+                        // 兼容：如果没有taskSubType，使用taskTypeId查询
                         com.designhub.entity.DemandType taskType = demandTypeMapper.selectById(mainTask.getTaskTypeId());
                         if (taskType != null) {
                             groupInfo.put("taskTypeName", taskType.getName());