diff --git a/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdEngInfoBHServiceImpl.java b/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdEngInfoBHServiceImpl.java
index 4d59891b..568249a6 100644
--- a/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdEngInfoBHServiceImpl.java
+++ b/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdEngInfoBHServiceImpl.java
@@ -300,11 +300,7 @@ public class SdEngInfoBHServiceImpl extends ServiceImpl<SdEngInfoBHMapper, SdEng
                 "TOP_HYNM"
         ));
         sql.append(", ");
-        sql.append(buildScalarNameSelect(
-                StringUtils.hasText((String) paramMap.get("reachcd")),
-                "(SELECT rv.RVNM FROM SD_RVCD_DIC rv WHERE rv.RVCD = #{map.reachcd} AND ROWNUM = 1)",
-                "REACHCD_NAME"
-        ));
+        sql.append(buildReachcdNameSelect(paramMap));
         sql.append(" FROM DUAL");
         return sql.toString();
     }
@@ -328,6 +324,19 @@ public class SdEngInfoBHServiceImpl extends ServiceImpl<SdEngInfoBHMapper, SdEng
         return querySql + " AS " + alias;
     }
 
+    private String buildReachcdNameSelect(Map<String, Object> paramMap) {
+        if (!StringUtils.hasText((String) paramMap.get("reachcd"))) {
+            return "NULL AS REACHCD_NAME";
+        }
+        return "(SELECT LISTAGG(pathNode.RVNM, '-') WITHIN GROUP (ORDER BY pathNode.LVL DESC) " +
+                "FROM ( " +
+                "   SELECT rv.RVNM, LEVEL AS LVL " +
+                "   FROM SD_RVCD_DIC rv " +
+                "   START WITH rv.RVCD = #{map.reachcd} " +
+                "   CONNECT BY PRIOR rv.PRVCD = rv.RVCD " +
+                ") pathNode) AS REACHCD_NAME";
+    }
+
     private String resolveRelatedName(String code, Map<String, Object> row, String column) {
         if (code == null) {
             return null;