diff --git a/backend/src/main/java/com/designhub/service/ExportService.java b/backend/src/main/java/com/designhub/service/ExportService.java
index 0d650d2..ca9ee6e 100644
--- a/backend/src/main/java/com/designhub/service/ExportService.java
+++ b/backend/src/main/java/com/designhub/service/ExportService.java
@@ -94,7 +94,8 @@ public class ExportService {
             vo.setTaskNo(task.getTaskNo());
             vo.setTitle(task.getTitle());
             vo.setTaskType(taskTypeMap.getOrDefault(task.getTaskTypeId(), ""));
-            vo.setDemandType(demandTypeMap.getOrDefault(task.getDemandTypeId(), ""));
+            // 需求类型使用 taskSubType 字段（新品/优化/实拍等）
+            vo.setDemandType(task.getTaskSubType() != null ? task.getTaskSubType() : "");
             vo.setBrand(brandMap.getOrDefault(task.getBrandId(), ""));
             vo.setCategory(categoryMap.getOrDefault(task.getCategoryId(), ""));
             vo.setPlatform(platformMap.getOrDefault(task.getPlatformId(), ""));