diff --git a/src/main/java/com/point/strategy/classTree/controller/ClassTreeController.java b/src/main/java/com/point/strategy/classTree/controller/ClassTreeController.java
index 1cc5ae8..a6ba8bb 100644
--- a/src/main/java/com/point/strategy/classTree/controller/ClassTreeController.java
+++ b/src/main/java/com/point/strategy/classTree/controller/ClassTreeController.java
@@ -118,7 +118,21 @@ public class ClassTreeController {
         try {
 
             String className = param.get("className").toString();
-            List<ClassTree> list = classTreeService.getClassTreeByClassName(className);
+            boolean onlyMapped = false;
+            if (param.get("onlyMapped") != null) {
+                onlyMapped = Boolean.parseBoolean(param.get("onlyMapped").toString());
+            }
+            Integer fondId = null;
+            if (param.get("fondId") != null) {
+                fondId = Integer.parseInt(param.get("fondId").toString());
+            }
+            Integer deptId = null;
+            if (param.get("deptId") != null) {
+                deptId = Integer.parseInt(param.get("deptId").toString());
+            }
+            List<ClassTree> list = onlyMapped
+                    ? classTreeService.getClassTreeByClassNameMappedUnion(className, fondId, deptId)
+                    : classTreeService.getClassTreeByClassName(className);
             json = new AjaxJson();
             json.getBody().put("list",list);
         }catch(Exception e) {
diff --git a/src/main/java/com/point/strategy/classTree/mapper/ClassTreeMapper.java b/src/main/java/com/point/strategy/classTree/mapper/ClassTreeMapper.java
index 0172cbc..736b492 100644
--- a/src/main/java/com/point/strategy/classTree/mapper/ClassTreeMapper.java
+++ b/src/main/java/com/point/strategy/classTree/mapper/ClassTreeMapper.java
@@ -42,4 +42,8 @@ public interface ClassTreeMapper {
     List<ClassTree> getClassByUserId(@Param("userId") Integer userId);
 
     List<ClassTree> getClassByDeptId(@Param("deptId") Integer deptId);
+
+    List<Integer> getMappedClassIdsUnion();
+
+    List<Integer> getMappedClassIdsUnionBySelection(@Param("fondId") Integer fondId, @Param("deptId") Integer deptId);
 }
diff --git a/src/main/java/com/point/strategy/classTree/service/ClassTreeService.java b/src/main/java/com/point/strategy/classTree/service/ClassTreeService.java
index 773283b..d89d489 100644
--- a/src/main/java/com/point/strategy/classTree/service/ClassTreeService.java
+++ b/src/main/java/com/point/strategy/classTree/service/ClassTreeService.java
@@ -335,6 +335,53 @@ public class ClassTreeService {
         return list;
     }
 
+    /**
+     * 返回“门类树”但仅包含已在 t_fondclass 或 t_departmentclass 中出现过的门类（并集），并保留必要的父节点以形成树结构。
+     */
+    public List<ClassTree> getClassTreeByClassNameMappedUnion(String className, Integer fondId, Integer deptId) {
+        List<ClassTree> fullTree = getClassTreeByClassName(className);
+        List<Integer> mappedIds;
+        if (fondId == null && deptId == null) {
+            mappedIds = classTreeMapper.getMappedClassIdsUnion();
+        } else {
+            mappedIds = classTreeMapper.getMappedClassIdsUnionBySelection(fondId, deptId);
+        }
+        if (mappedIds == null || mappedIds.isEmpty() || fullTree == null || fullTree.isEmpty()) {
+            return new ArrayList<>();
+        }
+        Set<Integer> allowedIds = new HashSet<>(mappedIds);
+        List<ClassTree> filtered = new ArrayList<>();
+        for (ClassTree node : fullTree) {
+            ClassTree kept = filterTreeByAllowedIds(node, allowedIds);
+            if (kept != null) {
+                filtered.add(kept);
+            }
+        }
+        return filtered;
+    }
+
+    private ClassTree filterTreeByAllowedIds(ClassTree node, Set<Integer> allowedIds) {
+        if (node == null) {
+            return null;
+        }
+        List<ClassTree> children = node.getChildClass();
+        List<ClassTree> keptChildren = new ArrayList<>();
+        if (children != null && !children.isEmpty()) {
+            for (ClassTree child : children) {
+                ClassTree keptChild = filterTreeByAllowedIds(child, allowedIds);
+                if (keptChild != null) {
+                    keptChildren.add(keptChild);
+                }
+            }
+        }
+        boolean keepSelf = node.getId() != null && allowedIds.contains(node.getId());
+        if (!keepSelf && keptChildren.isEmpty()) {
+            return null;
+        }
+        node.setChildClass(keptChildren);
+        return node;
+    }
+
     /**
      * 知识产权树
      * @param className
@@ -1025,5 +1072,3 @@ public class ClassTreeService {
 
 }
 
-
-
diff --git a/src/main/resources/mapper/classTreeMapper.xml b/src/main/resources/mapper/classTreeMapper.xml
index c1e7ae6..562273c 100644
--- a/src/main/resources/mapper/classTreeMapper.xml
+++ b/src/main/resources/mapper/classTreeMapper.xml
@@ -155,5 +155,25 @@
         where t1.id=#{userId} and t5.class_type='C'
         order by t5.class_order asc
     </select>
+
+    <select id="getMappedClassIdsUnion" resultType="int">
+        select distinct classid from t_fondclass
+        union
+        select distinct classid from t_departmentclass
+    </select>
+
+    <select id="getMappedClassIdsUnionBySelection" resultType="int">
+        select distinct classid from (
+            <if test="fondId != null">
+                select classid from t_fondclass where fondid = #{fondId,jdbcType=INTEGER}
+            </if>
+            <if test="fondId != null and deptId != null">
+                union
+            </if>
+            <if test="deptId != null">
+                select classid from t_departmentclass where deptid = #{deptId,jdbcType=INTEGER}
+            </if>
+        ) t
+    </select>
     
-</mapper>
\ No newline at end of file
+</mapper>