diff --git a/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/engine/dynPage/DynPageHelper.java b/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/engine/dynPage/DynPageHelper.java
index 5f68902..d78f1f7 100644
--- a/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/engine/dynPage/DynPageHelper.java
+++ b/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/engine/dynPage/DynPageHelper.java
@@ -76,12 +76,11 @@ public class DynPageHelper {
     }
 
     //构建树型查询语句，插入parent_id=?
-    public static SqlNamedPara buildTreeSelectSql(PageDataset dataSet, SwMap params) {
+    public static SqlNamedPara buildTreeSelectSql(PageDataset dataSet, SwMap params, long parentId) {
         ModelTable table = ModelTableCache.getInstance().get(dataSet.masterTable);
         if (table == null) throw new SwException("没有找到指定的表：" + dataSet.masterTable);
         SqlNamedPara sqlNamedPara = buildWhereSql(dataSet, params);
         if (table.getType() == SwEnum.TableType.TYPE_TREE.value) {//是树型结构，才做处理
-            long parentId = params.readLong("parent_id");
             ModelField field = table.findFieldByType(SwEnum.FieldType.PARENT_ID.value);
             if (field == null) throw new SwException("树型表（" + table.getName() + "）未定义上级id字段！");
 
diff --git a/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/engine/dynPage/DynPageTreeHandler.java b/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/engine/dynPage/DynPageTreeHandler.java
index f6a2a5c..78946ee 100644
--- a/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/engine/dynPage/DynPageTreeHandler.java
+++ b/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/engine/dynPage/DynPageTreeHandler.java
@@ -1,5 +1,6 @@
 package cc.smtweb.system.bpm.web.engine.dynPage;
 
+import cc.smtweb.framework.core.common.SwConsts;
 import cc.smtweb.framework.core.common.SwEnum;
 import cc.smtweb.framework.core.common.SwMap;
 import cc.smtweb.framework.core.db.DbEngine;
@@ -51,8 +52,8 @@ public class DynPageTreeHandler extends AbstractTreeHandler<SwMap> {
      * 构建sql
      * @return
      */
-    protected SqlNamedPara buildDataSqlPara() {
-        return DynPageHelper.buildTreeSelectSql(pageDataSet, filter);
+    protected SqlNamedPara buildDataSqlPara(long id) {
+        return DynPageHelper.buildTreeSelectSql(pageDataSet, filter, id);
     }
 
     /**
@@ -65,7 +66,8 @@ public class DynPageTreeHandler extends AbstractTreeHandler<SwMap> {
 
     @Override
     protected List<SwMap> getChildren(long id) {
-        SqlNamedPara sqlPara = buildDataSqlPara();
+        if (id <= 0) id = SwConsts.DEF_ROOT_ID_LONG;
+        SqlNamedPara sqlPara = buildDataSqlPara(id);
         return DbEngine.getInstance().queryN(sqlPara.sql, sqlPara.mapParas, SwMap.class);
     }
 
diff --git a/smtweb-framework/core/src/main/java/cc/smtweb/framework/core/common/SwConsts.java b/smtweb-framework/core/src/main/java/cc/smtweb/framework/core/common/SwConsts.java
index 65df21a..f54e606 100644
--- a/smtweb-framework/core/src/main/java/cc/smtweb/framework/core/common/SwConsts.java
+++ b/smtweb-framework/core/src/main/java/cc/smtweb/framework/core/common/SwConsts.java
@@ -10,6 +10,7 @@ public interface SwConsts {
     String SPLIT_CHAR = "-";
     //默认根节点
     String DEF_ROOT_ID = "-1";
+    long DEF_ROOT_ID_LONG = -1;
 
     //列表分页的页码和每页记录数
     String PARAM_PAGE = "page";