diff --git a/packages/abc/st/demo/edit-row.md b/packages/abc/st/demo/edit-row.md
index ca339d191..d5fd77d45 100644
--- a/packages/abc/st/demo/edit-row.md
+++ b/packages/abc/st/demo/edit-row.md
@@ -16,7 +16,6 @@ Table with editable rows.
 ```ts
 import { Component, ViewChild } from '@angular/core';
 import { STColumn, STComponent, STData } from '@delon/abc/st';
-import { deepCopy } from '@delon/util';
 import { NzMessageService } from 'ng-zorro-antd/message';
 
 @Component({
@@ -82,10 +81,7 @@ export class DemoComponent {
   constructor(private msg: NzMessageService) {}
 
   private submit(i: STData): void {
-    // Remove _values
-    const copyI = deepCopy(i);
-    delete copyI._values;
-    this.msg.success(JSON.stringify(copyI));
+    this.msg.success(JSON.stringify(this.st.pureItem(i)));
     this.updateEdit(i, false);
   }
 
diff --git a/packages/abc/st/index.en-US.md b/packages/abc/st/index.en-US.md
index d9b4bba99..32d55db81 100644
--- a/packages/abc/st/index.en-US.md
+++ b/packages/abc/st/index.en-US.md
@@ -101,6 +101,7 @@ When an exception is thrown when parsing column data, *INVALID DATA* will be for
 | `reset(extraParams?: any, options?: STLoadOptions)` | Reset data and `pi` to `1`, including single multi-select, sort, filter status (Covered default state) |
 | `removeRow(data: STData | STData[] | number)` | Remove a row in the table |
 | `setRow(index: number | STData, item: STData, options?: { refreshSchema?: boolean; emitReload?: boolean })` | Sets the row value for the `index` in the table |
+| `pureItem(itemOrIndex: STData | number)` | Return pure data, `st` internally maintains a set of data for caching, this part of data may affect the backend |
 | `clear(cleanStatus = true)` | Clear all data |
 | `clearStatus()` | Clean all status (like this: single multi-select, sort, filter status) |
 | `clearCheck()` | Clear all `checkbox` |
diff --git a/packages/abc/st/index.zh-CN.md b/packages/abc/st/index.zh-CN.md
index 67ea62564..65968f401 100644
--- a/packages/abc/st/index.zh-CN.md
+++ b/packages/abc/st/index.zh-CN.md
@@ -101,6 +101,7 @@ module: import { STModule } from '@delon/abc/st';
 | `reset(extraParams?: any, options?: STLoadOptions)` | 重置且重新设置 `pi` 为 `1`，包含单多选、排序、过滤状态（同默认状态一并清除） |
 | `removeRow(data: STData | STData[] | number)` | 移除行 |
 | `setRow(index: number | STData, item: STData, options?: { refreshSchema?: boolean; emitReload?: boolean })` | 修改行数据，支持部分字段更新 |
+| `pureItem(itemOrIndex: STData | number)` | 返回纯净数据，`st` 内部会维护一组用于缓存的数据，这部分数据可能会影响后端 |
 | `clear(cleanStatus = true)` | 清空所有数据 |
 | `clearStatus()` | 清空所有状态（包含单多选、排序、过滤状态） |
 | `clearCheck()` | 清除所有 `checkbox` |
diff --git a/packages/abc/st/st.component.ts b/packages/abc/st/st.component.ts
index 83c9fe08d..63bd567a6 100644
--- a/packages/abc/st/st.component.ts
+++ b/packages/abc/st/st.component.ts
@@ -36,6 +36,7 @@ import {
   AlainConfigService,
   AlainSTConfig,
   BooleanInput,
+  deepCopy,
   deepMergeKey,
   InputBoolean,
   InputNumber,
@@ -856,6 +857,23 @@ export class STComponent implements AfterViewInit, OnChanges, OnDestroy {
     this._data = this.dataSource.optimizeData({ columns: this._columns, result: this._data, rowClassName: this.rowClassName });
   }
 
+  /**
+   * Return pure data, `st` internally maintains a set of data for caching, this part of data may affect the backend
+   *
+   * 返回纯净数据，`st` 内部会维护一组用于缓存的数据，这部分数据可能会影响后端
+   */
+  pureItem(itemOrIndex: STData | number): STData | null {
+    if (typeof itemOrIndex === 'number') {
+      itemOrIndex = this._data[itemOrIndex];
+    }
+    if (!itemOrIndex) {
+      return null;
+    }
+    const copyItem = deepCopy(itemOrIndex);
+    delete copyItem._values;
+    return copyItem;
+  }
+
   ngAfterViewInit(): void {
     this.columnSource.restoreAllRender(this._columns);
   }
diff --git a/packages/abc/st/test/st.spec.ts b/packages/abc/st/test/st.spec.ts
index 4ac699e77..3be307f48 100644
--- a/packages/abc/st/test/st.spec.ts
+++ b/packages/abc/st/test/st.spec.ts
@@ -1593,6 +1593,26 @@ describe('abc: table', () => {
         expect(comp.list.length).toBe(PS);
         page.asyncEnd();
       }));
+      describe('#pureItem', () => {
+        it('should be deleted _values', fakeAsync(() => {
+          page.cd();
+          expect(comp.list[0]._values).not.toBeUndefined();
+          expect(comp.pureItem(comp.list[0])!._values).toBeUndefined();
+          page.asyncEnd();
+        }));
+        it('should be deleted _values via index', fakeAsync(() => {
+          page.cd();
+          expect(comp.list[0]._values).not.toBeUndefined();
+          expect(comp.pureItem(0)!._values).toBeUndefined();
+          page.asyncEnd();
+        }));
+        it('should be return null when not found row via index', fakeAsync(() => {
+          page.cd();
+          expect(comp.list[0]._values).not.toBeUndefined();
+          expect(comp.pureItem(PS + 10)).toBe(null);
+          page.asyncEnd();
+        }));
+      });
     });
     describe('#export', () => {
       let exportSrv: STExport;