diff --git a/backend/src/main/java/com/designhub/entity/DemandType.java b/backend/src/main/java/com/designhub/entity/DemandType.java
index 16bd9d4..7546343 100644
--- a/backend/src/main/java/com/designhub/entity/DemandType.java
+++ b/backend/src/main/java/com/designhub/entity/DemandType.java
@@ -86,6 +86,12 @@ public class DemandType implements Serializable {
     @TableField(fill = FieldFill.INSERT_UPDATE)
     private LocalDateTime updateTime;
 
+    /**
+     * 是否删除：0-未删除，1-已删除
+     */
+    @TableField("deleted")
+    private Integer deleted;
+
     /**
      * 子分类列表（不存储在数据库）
      */
diff --git a/backend/src/main/java/com/designhub/service/ConfigService.java b/backend/src/main/java/com/designhub/service/ConfigService.java
index e148299..194b6bf 100644
--- a/backend/src/main/java/com/designhub/service/ConfigService.java
+++ b/backend/src/main/java/com/designhub/service/ConfigService.java
@@ -49,6 +49,7 @@ public class ConfigService {
     public List<DemandType> getDemandTypesTree() {
         List<DemandType> allTypes = demandTypeMapper.selectList(
             new LambdaQueryWrapper<DemandType>()
+                .eq(DemandType::getDeleted, 0)  // 过滤已删除的
                 .orderByAsc(DemandType::getSortOrder)
         );
         // 构建树形结构
@@ -83,6 +84,7 @@ public class ConfigService {
     public List<DemandType> getEnabledDemandTypes() {
         List<DemandType> allTypes = demandTypeMapper.selectList(
             new LambdaQueryWrapper<DemandType>()
+                .eq(DemandType::getDeleted, 0)  // 过滤已删除的
                 .eq(DemandType::getIsEnabled, 1)
                 .orderByAsc(DemandType::getSortOrder)
         );