diff --git a/app/appearance/langs/en_US.json b/app/appearance/langs/en_US.json
index ceef89e39..41a035290 100644
--- a/app/appearance/langs/en_US.json
+++ b/app/appearance/langs/en_US.json
@@ -459,7 +459,7 @@
   "newNameFile": "The name of the new document is",
   "newContentFile": "The content of the new document is",
   "exporting": "Exporting, please wait...",
-  "exported": "Export complete: ",
+  "exported": "Export complete",
   "refExpired": "Search content block does not exist",
   "emptyContent": "No related content",
   "useBrowserView": "View in the browser",
diff --git a/app/appearance/langs/es_ES.json b/app/appearance/langs/es_ES.json
index 2110493af..137a02e4c 100644
--- a/app/appearance/langs/es_ES.json
+++ b/app/appearance/langs/es_ES.json
@@ -458,7 +458,7 @@
   "newNameFile": "El nombre del nuevo documento es",
   "newContentFile": "El contenido del nuevo documento es",
   "exporting": "Exportando, por favor espere...",
-  "exported": "Exportación completada: ",
+  "exported": "Exportación completada",
   "refExpired": "El bloque de contenido de búsqueda no existe",
   "emptyContent": "No hay contenido relacionado",
   "useBrowserView": "Ver en el navegador",
diff --git a/app/appearance/langs/fr_FR.json b/app/appearance/langs/fr_FR.json
index 7b8e41671..d881cc0b6 100644
--- a/app/appearance/langs/fr_FR.json
+++ b/app/appearance/langs/fr_FR.json
@@ -459,7 +459,7 @@
   "newNameFile": "Le nom du nouveau document est",
   "newContentFile": "Le contenu du nouveau document est",
   "exporting": "En cours d'exportation, veuillez patienter...",
-  "exported": "Exportation terminée: ",
+  "exported": "Exportation terminée",
   "refExpired": "Le bloc de contenu de recherche n'existe pas",
   "emptyContent": "Aucun contenu pertinent pour le moment",
   "useBrowserView": "Afficher dans le navigateur",
diff --git a/app/appearance/langs/zh_CHT.json b/app/appearance/langs/zh_CHT.json
index 38951d1fa..4d2ff6d99 100644
--- a/app/appearance/langs/zh_CHT.json
+++ b/app/appearance/langs/zh_CHT.json
@@ -459,7 +459,7 @@
   "newNameFile": "新建文檔名為",
   "newContentFile": "新建文檔內容為",
   "exporting": "正在匯出，請稍等...",
-  "exported": "匯出完成：",
+  "exported": "匯出完成",
   "refExpired": "不存在符合條件的內容塊",
   "emptyContent": "暫無相關內容",
   "useBrowserView": "在瀏覽器中查看",
diff --git a/app/appearance/langs/zh_CN.json b/app/appearance/langs/zh_CN.json
index 55773d451..36cc7ccab 100644
--- a/app/appearance/langs/zh_CN.json
+++ b/app/appearance/langs/zh_CN.json
@@ -459,7 +459,7 @@
   "newNameFile": "新建文档名为",
   "newContentFile": "新建文档内容为",
   "exporting": "正在导出，请稍等...",
-  "exported": "导出完成：",
+  "exported": "导出完成",
   "refExpired": "不存在符合条件的内容块",
   "emptyContent": "暂无相关内容",
   "useBrowserView": "在浏览器中查看",
diff --git a/app/src/protyle/export/util.ts b/app/src/protyle/export/util.ts
index 935bb92ef..69e264a83 100644
--- a/app/src/protyle/export/util.ts
+++ b/app/src/protyle/export/util.ts
@@ -15,7 +15,7 @@ import {openByMobile} from "../util/compatibility";
 
 export const afterExport = (exportPath: string, msgId: string) => {
     /// #if !BROWSER
-    showMessage(`${window.siyuan.languages.exported}${escapeHtml(exportPath)}
+    showMessage(`${window.siyuan.languages.exported} ${escapeHtml(exportPath)}
 <div class="fn__space"></div>
 <button class="b3-button b3-button--white">${window.siyuan.languages.showInFolder}</button>`, 6000, "info", msgId);
     document.querySelector(`#message [data-id="${msgId}"] button`).addEventListener("click", () => {
diff --git a/app/src/util/onGetConfig.ts b/app/src/util/onGetConfig.ts
index cac6d6020..e82b5c4bb 100644
--- a/app/src/util/onGetConfig.ts
+++ b/app/src/util/onGetConfig.ts
@@ -383,6 +383,7 @@ const initWindow = () => {
                         id: ipcData.rootId,
                         pdf: true,
                         removeAssets: ipcData.removeAssets,
+                        merge: ipcData.mergeSubdocs,
                         savePath: result.filePaths[0]
                     }, () => {
                         const pdfFilePath = path.join(result.filePaths[0], replaceLocalPath(ipcData.rootTitle) + ".pdf");
diff --git a/kernel/model/export.go b/kernel/model/export.go
index dc37da427..debfedbcc 100644
--- a/kernel/model/export.go
+++ b/kernel/model/export.go
@@ -341,6 +341,16 @@ func ExportMarkdownHTML(id, savePath string, docx, merge bool) (name, dom string
 func ExportHTML(id, savePath string, pdf, keepFold, merge bool) (name, dom string) {
 	savePath = strings.TrimSpace(savePath)
 	tree, _ := loadTreeByBlockID(id)
+
+	if merge {
+		var mergeErr error
+		tree, mergeErr = mergeSubDocs(tree)
+		if nil != mergeErr {
+			logging.LogErrorf("merge sub docs failed: %s", mergeErr)
+			return
+		}
+	}
+
 	var headings []*ast.Node
 	if pdf { // 导出 PDF 需要标记目录书签
 		ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
@@ -363,14 +373,6 @@ func ExportHTML(id, savePath string, pdf, keepFold, merge bool) (name, dom strin
 		}
 	}
 
-	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
@@ -502,8 +504,12 @@ func AddPDFOutline(id, p string) (err error) {
 	footnotes := map[string]*pdfcpu.Bookmark{}
 	for _, link := range links {
 		linkID := link.URI[strings.LastIndex(link.URI, "/")+1:]
-
-		title := sql.GetBlock(linkID).Content
+		b := sql.GetBlock(linkID)
+		if nil == b {
+			logging.LogWarnf("pdf outline block [%s] not found", linkID)
+			continue
+		}
+		title := b.Content
 		title, _ = url.QueryUnescape(title)
 		bm := &pdfcpu.Bookmark{
 			Title:    title,
diff --git a/kernel/model/export_merge.go b/kernel/model/export_merge.go
index 2bab6eea1..00ca2f024 100644
--- a/kernel/model/export_merge.go
+++ b/kernel/model/export_merge.go
@@ -29,12 +29,22 @@ func mergeSubDocs(rootTree *parse.Tree) (ret *parse.Tree, err error) {
 	}
 
 	insertPoint := rootTree.Root.LastChild
+	if nil == insertPoint {
+		insertPoint = rootTree.Root
+	}
+
+	// 跳过空段落插入点，向上寻找非空段落
+	for ; nil != insertPoint && ast.NodeParagraph == insertPoint.Type; insertPoint = insertPoint.Previous {
+		if nil != insertPoint.FirstChild {
+			break
+		}
+	}
+
 	for {
 		i := 0
 		if err = walkBlock(insertPoint, rootBlock, i); nil != err {
 			return
 		}
-
 		if nil == rootBlock.Children {
 			break
 		}
@@ -44,13 +54,12 @@ func mergeSubDocs(rootTree *parse.Tree) (ret *parse.Tree, err error) {
 
 func walkBlock(insertPoint *ast.Node, block *Block, level int) (err error) {
 	level++
-	for _, c := range block.Children {
+	for i := len(block.Children) - 1; i >= 0; i-- {
+		c := block.Children[i]
 		if err = walkBlock(insertPoint, c, level); nil != err {
 			return
 		}
-	}
 
-	for _, c := range block.Children {
 		nodes, loadErr := loadTreeNodes(c.Box, c.Path, level)
 		if nil != loadErr {
 			return
diff --git a/kernel/model/file.go b/kernel/model/file.go
index 2e5f800c3..577e3d628 100644
--- a/kernel/model/file.go
+++ b/kernel/model/file.go
@@ -660,7 +660,7 @@ func GetDoc(startID, endID, id string, index int, keyword string, mode int, size
 	luteEngine.RenderOptions.NodeIndexStart = index
 	dom = luteEngine.Tree2BlockDOM(subTree, luteEngine.RenderOptions)
 
-	SetRecentDocByTree(id, tree)
+	SetRecentDocByTree(tree)
 	return
 }
 
diff --git a/kernel/model/storage.go b/kernel/model/storage.go
index 4d3520f13..cf6252bae 100644
--- a/kernel/model/storage.go
+++ b/kernel/model/storage.go
@@ -30,11 +30,8 @@ import (
 
 type RecentDoc struct {
 	RootID string `json:"rootID"`
-	ID     string `json:"id"`
 	Icon   string `json:"icon"`
 	Title  string `json:"title"`
-	Mode   string `json:"mode"`
-	Action string `json:"action"`
 }
 
 var recentDocLock = sync.Mutex{}
@@ -63,10 +60,9 @@ func RemoveRecentDoc(ids []string) {
 	return
 }
 
-func SetRecentDocByTree(id string, tree *parse.Tree) {
+func SetRecentDocByTree(tree *parse.Tree) {
 	recentDoc := &RecentDoc{
 		RootID: tree.Root.ID,
-		ID:     id,
 		Icon:   tree.Root.IALAttr("icon"),
 		Title:  tree.Root.IALAttr("title"),
 	}