diff --git a/yuthon_report/models/receivable_flow_report.py b/yuthon_report/models/receivable_flow_report.py
index 8df4fff0a..d8f73520a 100644
--- a/yuthon_report/models/receivable_flow_report.py
+++ b/yuthon_report/models/receivable_flow_report.py
@@ -115,9 +115,11 @@ class ReceivableFlowReport(models.Model):
             contract_total_unpaid = sum(r.submitted for r in contract_recs)
 
             seq += 1
+            contract_key = contract.contract_code if (contract and contract.contract_code) else "contract_{}".format(seq)
             # ==== 合同头行 ====
             rows.append({
                 "row_type": "合同",
+                "orgHierarchy": [contract_key],
                 "序号": seq,
                 "租金id": "",
                 "合同编号": {
@@ -211,6 +213,7 @@ class ReceivableFlowReport(models.Model):
                 # ==== 应收租金行 ====
                 rows.append({
                     "row_type": "主",
+                    "orgHierarchy": [contract_key, str(rec.id)],
                     "序号": "",
                     "租金id": rec.id,
                     "合同编号": "",
@@ -260,6 +263,7 @@ class ReceivableFlowReport(models.Model):
                     
                     rows.append({
                         "row_type": "收款",
+                        "orgHierarchy": [contract_key, str(rec.id), "pay_{}".format(ml.id)],
                         "序号": "",
                         "租金id": rec.id,
                         "合同编号": "",
diff --git a/yuthon_report/static/src/components/yuthon_report/receivable_report.js b/yuthon_report/static/src/components/yuthon_report/receivable_report.js
index 434ef7b5f..34bedc369 100644
--- a/yuthon_report/static/src/components/yuthon_report/receivable_report.js
+++ b/yuthon_report/static/src/components/yuthon_report/receivable_report.js
@@ -82,6 +82,20 @@ class ReceivableReport extends Component {
                 theme: agGrid.themeMaterial,
                 columnDefs: columns,
                 rowData: [],
+                // ===== Tree Data 折叠展开 =====
+                treeData: true,
+                getDataPath: (data) => data.orgHierarchy || [],
+                groupDefaultExpanded: 0,  // 默认全部折叠
+                autoGroupColumnDef: {
+                    headerName: '合同/明细',
+                    minWidth: 200,
+                    flex: 1.5,
+                    pinned: 'left',
+                    cellRendererParams: {
+                        suppressCount: true,  // 不显示子行数量
+                    },
+                },
+                // ===== 行样式 =====
                 rowClassRules: {
                     'ag-row-new-rent': function(params) {
                         return params.data && params.data.acc_type === 'new';