diff --git a/kernel/api/export.go b/kernel/api/export.go
index aa7ed6f6a..a5d0c7820 100644
--- a/kernel/api/export.go
+++ b/kernel/api/export.go
@@ -160,7 +160,11 @@ func exportDocx(c *gin.Context) {
 	id := arg["id"].(string)
 	savePath := arg["savePath"].(string)
 	removeAssets := arg["removeAssets"].(bool)
-	err := model.ExportDocx(id, savePath, removeAssets)
+	merge := false
+	if nil != arg["merge"] {
+		merge = arg["merge"].(bool)
+	}
+	err := model.ExportDocx(id, savePath, removeAssets, merge)
 	if nil != err {
 		ret.Code = 1
 		ret.Msg = err.Error()
@@ -180,7 +184,7 @@ func exportMdHTML(c *gin.Context) {
 
 	id := arg["id"].(string)
 	savePath := arg["savePath"].(string)
-	name, content := model.ExportMarkdownHTML(id, savePath, false)
+	name, content := model.ExportMarkdownHTML(id, savePath, false, false)
 	ret.Data = map[string]interface{}{
 		"id":      id,
 		"name":    name,
@@ -229,10 +233,14 @@ func exportPreviewHTML(c *gin.Context) {
 
 	id := arg["id"].(string)
 	keepFold := false
-	if arg["keepFold"] != nil {
+	if nil != arg["keepFold"] {
 		keepFold = arg["keepFold"].(bool)
 	}
-	name, content := model.ExportHTML(id, "", true, keepFold)
+	merge := false
+	if nil != arg["merge"] {
+		merge = arg["merge"].(bool)
+	}
+	name, content := model.ExportHTML(id, "", true, keepFold, merge)
 	// 导出 PDF 预览时点击块引转换后的脚注跳转不正确 https://github.com/siyuan-note/siyuan/issues/5894
 	content = strings.ReplaceAll(content, "http://"+util.LocalHost+":"+util.ServerPort+"/#", "#")
 
@@ -256,10 +264,14 @@ func exportHTML(c *gin.Context) {
 	pdf := arg["pdf"].(bool)
 	savePath := arg["savePath"].(string)
 	keepFold := false
-	if arg["keepFold"] != nil {
+	if nil != arg["keepFold"] {
 		keepFold = arg["keepFold"].(bool)
 	}
-	name, content := model.ExportHTML(id, savePath, pdf, keepFold)
+	merge := false
+	if nil != arg["merge"] {
+		merge = arg["merge"].(bool)
+	}
+	name, content := model.ExportHTML(id, savePath, pdf, keepFold, merge)
 	ret.Data = map[string]interface{}{
 		"id":      id,
 		"name":    name,
diff --git a/kernel/model/export.go b/kernel/model/export.go
index 353b894a6..dc37da427 100644
--- a/kernel/model/export.go
+++ b/kernel/model/export.go
@@ -194,7 +194,7 @@ func Preview(id string) string {
 	return luteEngine.ProtylePreview(tree, luteEngine.RenderOptions)
 }
 
-func ExportDocx(id, savePath string, removeAssets bool) (err error) {
+func ExportDocx(id, savePath string, removeAssets, merge bool) (err error) {
 	if !util.IsValidPandocBin(Conf.Export.PandocBin) {
 		return errors.New(Conf.Language(115))
 	}
@@ -204,7 +204,7 @@ func ExportDocx(id, savePath string, removeAssets bool) (err error) {
 		return
 	}
 	defer os.Remove(tmpDir)
-	name, content := ExportMarkdownHTML(id, tmpDir, true)
+	name, content := ExportMarkdownHTML(id, tmpDir, true, merge)
 
 	tmpDocxPath := filepath.Join(tmpDir, name+".docx")
 	args := []string{ // pandoc -f html --resource-path=请从这里开始 请从这里开始\index.html -o test.docx
@@ -237,9 +237,18 @@ func ExportDocx(id, savePath string, removeAssets bool) (err error) {
 	return
 }
 
-func ExportMarkdownHTML(id, savePath string, docx bool) (name, dom string) {
+func ExportMarkdownHTML(id, savePath string, docx, merge bool) (name, dom string) {
 	tree, _ := loadTreeByBlockID(id)
 
+	if merge {
+		var mergeErr error
+		tree, mergeErr = mergeSubDocs(tree)
+		if nil != mergeErr {
+			logging.LogErrorf("merge sub docs failed: %s", mergeErr)
+			return
+		}
+	}
+
 	tree = exportTree(tree, true, true, false)
 	name = path.Base(tree.HPath)
 	name = util.FilterFileName(name) // 导出 PDF、HTML 和 Word 时未移除不支持的文件名符号 https://github.com/siyuan-note/siyuan/issues/5614
@@ -329,7 +338,7 @@ func ExportMarkdownHTML(id, savePath string, docx bool) (name, dom string) {
 	return
 }
 
-func ExportHTML(id, savePath string, pdf, keepFold bool) (name, dom string) {
+func ExportHTML(id, savePath string, pdf, keepFold, merge bool) (name, dom string) {
 	savePath = strings.TrimSpace(savePath)
 	tree, _ := loadTreeByBlockID(id)
 	var headings []*ast.Node
@@ -354,6 +363,14 @@ func ExportHTML(id, savePath string, pdf, keepFold bool) (name, dom string) {
 		}
 	}
 
+	if merge {
+		var mergeErr error
+		tree, mergeErr = mergeSubDocs(tree)
+		if nil != mergeErr {
+			logging.LogErrorf("merge sub docs failed: %s", mergeErr)
+			return
+		}
+	}
 	tree = exportTree(tree, true, true, keepFold)
 	name = path.Base(tree.HPath)
 	name = util.FilterFileName(name) // 导出 PDF、HTML 和 Word 时未移除不支持的文件名符号 https://github.com/siyuan-note/siyuan/issues/5614