diff --git a/ExcelFile使用帮助.xlsx b/ExcelFile使用帮助.xlsx
index 2adfd74..177cc91 100644
Binary files a/ExcelFile使用帮助.xlsx and b/ExcelFile使用帮助.xlsx differ
diff --git a/funcext/TSOffice/TOfficeObj.tsf b/funcext/TSOffice/TOfficeObj.tsf
index 619c9bb..c41dbb5 100644
--- a/funcext/TSOffice/TOfficeObj.tsf
+++ b/funcext/TSOffice/TOfficeObj.tsf
@@ -1,4 +1,4 @@
-// Version 1.1.8
+// Version 1.1.9
 
 Function TOfficeObj(n);
 Begin
diff --git a/funcext/TSOffice/TSDocxFile.tsf b/funcext/TSOffice/TSDocxFile.tsf
index 265de7c..3e40e8c 100644
--- a/funcext/TSOffice/TSDocxFile.tsf
+++ b/funcext/TSOffice/TSDocxFile.tsf
@@ -1,4 +1,4 @@
-// Version 1.1.8
+// Version 1.1.9
 
 Type TSDocxFile = Class
 	///Version: V1.0 2022-09-20
diff --git a/funcext/TSOffice/TSExcelFile.tsf b/funcext/TSOffice/TSExcelFile.tsf
index 1aa8f83..18b92b5 100644
--- a/funcext/TSOffice/TSExcelFile.tsf
+++ b/funcext/TSOffice/TSExcelFile.tsf
@@ -1,4 +1,4 @@
-// Version 1.1.8
+// Version 1.1.9
 
 Type TSExcelFile = Class
 	///Version: V1.0 2022-08-08
@@ -141,7 +141,7 @@ Type TSExcelFile = Class
 		return workbook_.NewSheet(class(TSXml).CurCodePageToUtf8(sheet));
 	End;
 
-	///在指定sheet之前插入新sheet
+	///在指定sheet之后插入新sheet
 	///sourceSheet: string，指定工作表名称
 	///destSheet: string，目的工作表名称
 	Function NewSheet(sourceSheet, destSheet);overload;
@@ -149,6 +149,14 @@ Type TSExcelFile = Class
 		return workbook_.NewSheet(class(TSXml).CurCodePageToUtf8(sourceSheet), class(TSXml).CurCodePageToUtf8(destSheet));
 	End;
 
+	///在指定sheet之前插入新sheet
+	///sourceSheet: string，指定工作表名称
+	///destSheet: string，目的工作表名称
+	Function InsertSheet(sourceSheet, destSheet);
+	Begin
+		return workbook_.InsertSheet(class(TSXml).CurCodePageToUtf8(sourceSheet), class(TSXml).CurCodePageToUtf8(destSheet));
+	End;
+
 	///删除sheet
 	///sheet: string，工作表名称
 	Function DeleteSheet(sheet);
diff --git a/funcext/TSOffice/worksheet/xlsxWorkBook.tsf b/funcext/TSOffice/worksheet/xlsxWorkBook.tsf
index 1ae43fa..333145c 100644
--- a/funcext/TSOffice/worksheet/xlsxWorkBook.tsf
+++ b/funcext/TSOffice/worksheet/xlsxWorkBook.tsf
@@ -281,6 +281,92 @@ Type xlsxWorkBook = Class
 		SetDefaultSheet(destSheet);
 	End;
 
+	Function InsertSheet(sourceSheet, destSheet);
+	Begin
+		lname := LowerCase(destSheet);
+		if ifint(sheetIndexMap_[ lname ]) then return 'destSheet already exists.';
+		sname := LowerCase(sourceSheet);
+		if not ifint(sheetIndexMap_[ sname ]) then return 'sourceSheet does not exists';
+
+		//添加文件xl/worksheets/sheetN.xml
+		sheetId := vselect maxof(['sheetId']) from sheetNames_ end;
+		sheetId := integer(sheetId) + 1;
+		fname := sheetPrefix_ $ inttostr(sheetsCount_ + 1) $ '.xml';
+		zipfile_.Add(fname, class(TSXml).XmlHeader() + class(TSXml).GetTemplate('sheet1'));
+
+		//设置 workbook.xml.rels
+		rid := getWorkbookRelsRid();
+		workbook_rels := GetXmlFileObj('xl/_rels/workbook.xml.rels');
+		rels := workbook_rels.FirstChildElement('Relationships').InsertEndChild('element', 'Relationship');
+		rels.SetAttribute('Target', getTarget( sheetsCount_ + 1));
+		rels.SetAttribute('Type', class(TSXml).GetTemplate('RelationshipWorkSheet'));
+		rels.SetAttribute('Id', rid);
+		//workbook_rels.Print;
+
+		//设置 xl/workbook.xml
+		workbook := GetXmlFileObj('xl/workbook.xml');
+		node := workbook.FirstChildElement('workbook').FirstChildElement('sheets');
+		sheet_node := node.FirstChildElement('sheet');
+		prev_node := nil;
+		while ifObj(sheet_node) do
+		begin
+			if LowerCase(sheet_node.GetAttribute('name')) = LowerCase(sourceSheet) then
+			begin
+				if ifnil(prev_node) then sheet_node := node.InsertFirstChild('element', 'sheet');
+				else sheet_node := node.InsertAfterChild(prev_node, 'element', 'sheet');	
+				sheet_node.SetAttribute('name', destSheet);
+				sheet_node.SetAttribute('sheetId', sheetId);
+				sheet_node.SetAttribute('r:id', rid);
+				break;
+			end
+			prev_node := sheet_node;
+			sheet_node := sheet_node.NextElement();
+		end
+		//workbook.Print();
+
+		//设置docProps/app.xml
+		app := GetXmlFileObj(class(TSXml).GetFileName('docProps_app'));
+		//app.Print();
+		node := app.FirstChildElement('Properties').FirstChildElement('TitlesOfParts');
+		vector := node.FirstChildElement('vt:vector');
+		vector.SetAttribute('size', length(sheetNames_) + 1);
+		lpstr := vector.FirstChildElement('vt:lpstr');
+		pstr := nil;
+		while ifObj(lpstr) do
+		begin
+			if LowerCase(lpstr.GetText()) = LowerCase(sourceSheet) then
+			begin
+				if ifnil(pstr) then vector.InsertFirstChild('element', 'vt:lpstr');
+				else lpstr := vector.InsertAfterChild(pstr, 'element', 'vt:lpstr');
+				lpstr.SetValue(destSheet);
+				break;
+			end
+			pstr := lpstr;
+			lpstr := lpstr.NextElement();
+		end
+		
+		//设置[Content_Types].xml
+		content_xml := GetXmlFileObj(class(TSXml).GetFileName('Content_Types'));
+		class(TSXml).AddOverrideContentType(content_xml, '/' + fname, class(TSXml).GetTemplate('sheetContentType'));
+
+		ind := sheetIndexMap_[sname];
+		for i:=sheetsCount_ downto ind+1 do
+		begin
+			sheetNames_[i]['name'] := sheetNames_[i-1]['name'];
+			sheetNames_[i]['sheetId'] := sheetNames_[i-1]['sheetId'];
+			sheetNames_[i]['rid'] := sheetNames_[i-1]['rid'];
+			sheetNames_[i]['file'] := sheetNames_[i-1]['file'];
+			sheetIndexMap_[ LowerCase(sheetNames_[i]['name']) ] := i;
+		end
+		sheetIndexMap_[lname] := ind;
+		sheetNames_[ind]['name'] := destSheet;
+		sheetNames_[ind]['sheetId'] := sheetId;
+		sheetNames_[ind]['rid'] := rid;
+		sheetNames_[ind]['file'] := fname;
+		sheetsCount_ ++;
+		SetDefaultSheet(destSheet);
+	End;
+
 	Function DeleteSheet(sheet);
 	Begin
 		if sheetsCount_ <= 1 then return 'Cant not delete the last sheet.';
diff --git a/更新日志.md b/更新日志.md
index 828b2ae..f97d1f3 100644
--- a/更新日志.md
+++ b/更新日志.md
@@ -2,6 +2,12 @@
 
 ## 2023-2-22
 
+### V1.1.9
+
+#### excel
+
+1. 新增`InsertSheet`
+
 ### V1.1.8
 
 #### excel