diff --git a/prisma/hyperdrive.prisma b/prisma/hyperdrive.prisma
index 6d4fbb1..833421f 100644
--- a/prisma/hyperdrive.prisma
+++ b/prisma/hyperdrive.prisma
@@ -250,8 +250,7 @@ model sr_platform_bind {
 }
 
 model sr_bookmark_share {
-    id   Int    @id @default(autoincrement())
-    uuid String @unique @default(dbgenerated("gen_random_uuid()"))
+    id Int @id @default(autoincrement())
 
     share_code    String   @default("")
     user_id       Int      @default(0)
@@ -264,8 +263,8 @@ model sr_bookmark_share {
     is_enable     Boolean  @default(true)
     created_at    DateTime @default(now())
 
-    @@unique([share_code])
     @@unique([bookmark_id, user_id])
+    @@index([share_code])
 }
 
 model sr_bookmark_import {
diff --git a/prisma/migrations/20260608030507_bookmark_share_index_sharecode/migration.sql b/prisma/migrations/20260608030507_bookmark_share_index_sharecode/migration.sql
new file mode 100644
index 0000000..d6ce088
--- /dev/null
+++ b/prisma/migrations/20260608030507_bookmark_share_index_sharecode/migration.sql
@@ -0,0 +1,17 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `uuid` on the `sr_bookmark_share` table. All the data in the column will be lost.
+
+*/
+-- DropIndex
+DROP INDEX "sr_bookmark_share_share_code_key";
+
+-- DropIndex
+DROP INDEX "sr_bookmark_share_uuid_key";
+
+-- AlterTable
+ALTER TABLE "sr_bookmark_share" DROP COLUMN "uuid";
+
+-- CreateIndex
+CREATE INDEX "sr_bookmark_share_share_code_idx" ON "sr_bookmark_share"("share_code");
diff --git a/src/domain/bookmark.ts b/src/domain/bookmark.ts
index e5b25b1..54715ce 100644
--- a/src/domain/bookmark.ts
+++ b/src/domain/bookmark.ts
@@ -789,6 +789,10 @@ export class BookmarkService {
     return await this.bookmarkRepo.getUserBookmarkByUuidWithDetail(uuid)
   }
 
+  public async getBookmarkShareByBookmarkId(bmId: number, userId: number) {
+    return await this.bookmarkRepo.getBookmarkShareByBookmarkId(bmId, userId)
+  }
+
   public async getUserBookmarkWithDetail(userId: number, bmId: number) {
     return (await this.bookmarkRepo.getUserBookmarkWithDetail(bmId, userId)) ?? null
   }
@@ -908,19 +912,17 @@ export class BookmarkService {
 
   public async getBookmarkTitleContent(
     ctx: ContextManager,
-    bmId?: number,
-    shareCode?: string,
-    cbId?: number,
-    title?: string,
-    content?: string
+    params: { bmId?: number; shareCode?: string; cbId?: number; title?: string; content?: string; bmUId?: string }
   ): Promise<{ title: string; content: string; bmId: number }> {
-    if (!bmId && !shareCode && !cbId && !title && !content) throw ErrorParam()
+    const { bmId, shareCode, cbId, title, content, bmUId } = params
 
-    if (!bmId && !shareCode && !cbId && title && content) {
+    const emptyId = !bmId && !shareCode && !cbId && !bmUId
+    if (emptyId && !title && !content) throw ErrorParam()
+    if (emptyId && title && content) {
       return { title, content, bmId: 0 }
     }
 
-    const bookmarkId = await this.getBookmarkId(ctx, { bmId, shareCode, cbId })
+    const bookmarkId = await this.getBookmarkId(ctx, { bmId, shareCode, cbId, bmUId })
     if (!bookmarkId || bookmarkId < 1) throw ErrorParam()
 
     const bookmark = await this.getBookmarkById(bookmarkId)
diff --git a/src/domain/orchestrator/share.ts b/src/domain/orchestrator/share.ts
index 289317b..817cc6f 100644
--- a/src/domain/orchestrator/share.ts
+++ b/src/domain/orchestrator/share.ts
@@ -113,4 +113,18 @@ export class ShareOrchestrator {
     if (!userBm) return { mark_list: [], user_list: [] }
     return await this.markService.getBookmarkMarkList(ctx, { id: userBm.id, isShowMarks: share.show_comment && share.show_line })
   }
+
+  public async getBookmarkShareMarkListByUid(ctx: ContextManager, bmUId: string): Promise<markDetail> {
+    const empty = { mark_list: [], user_list: [] }
+    const ub = await this.bookmarkService.getUserBookmarkByUuidWithDetail(bmUId)
+    if (!ub) return empty
+
+    if (ub.user_id !== ctx.getUserId()) {
+      const share = await this.bookmarkService.getBookmarkShareByBookmarkId(ub.bookmark_id, ub.user_id)
+      const allowed = !share || (share.is_enable && share.allow_comment && share.allow_line)
+      if (!allowed) return empty
+    }
+
+    return await this.markService.getBookmarkMarkList(ctx, { id: ub.id, isShowMarks: true })
+  }
 }
diff --git a/src/domain/share.ts b/src/domain/share.ts
index 77b09ce..d7e25dd 100644
--- a/src/domain/share.ts
+++ b/src/domain/share.ts
@@ -16,7 +16,8 @@ export interface updateBookmarkShareReq {
   show_comment_line: boolean
   show_userinfo: boolean
   allow_action: boolean
-  bookmark_id: number
+  bookmark_id?: number
+  bookmark_uid?: string
 }
 
 export interface getBookmarkByShareResp {
@@ -51,13 +52,21 @@ export interface getBookmarkByShareResp {
 export class ShareService {
   constructor(@inject(BookmarkRepo) private bookmarkRepo: BookmarkRepo) {}
 
-  public async checkBookmarkShareExists(ctx: ContextManager, bmId: number): Promise<createBookmarkShareResp> {
-    const userId = ctx.getUserId()
-
-    bmId = ctx.hashIds.decodeId(bmId)
-    if (bmId < 1) throw ErrorParam()
+  public async checkBookmarkShareExists(ctx: ContextManager, params: { bmId?: number; bmUId?: string }): Promise<createBookmarkShareResp> {
+    let bmId: number
+    let ownerUserId: number
+    if (params.bmUId) {
+      const ub = await this.bookmarkRepo.getUserBookmarkByUuid(params.bmUId)
+      if (!ub) throw ErrorParam()
+      bmId = ub.bookmark_id
+      ownerUserId = ub.user_id
+    } else {
+      bmId = ctx.hashIds.decodeId(params.bmId ?? 0)
+      if (bmId < 1) throw ErrorParam()
+      ownerUserId = ctx.getUserId()
+    }
 
-    const res = await this.bookmarkRepo.getBookmarkShareByBookmarkId(bmId, userId)
+    const res = await this.bookmarkRepo.getBookmarkShareByBookmarkId(bmId, ownerUserId)
     const isEnable = res && res.is_enable
     return {
       allow_action: isEnable ? res.allow_comment : false,
@@ -78,8 +87,16 @@ export class ShareService {
   public async updateBookmarkShare(ctx: ContextManager, req: updateBookmarkShareReq): Promise<createBookmarkShareResp> {
     const userId = ctx.getUserId()
 
-    const bmId = ctx.hashIds.decodeId(req.bookmark_id)
-    if (bmId < 1 || !bmId) throw ErrorParam()
+    let bmId: number
+    const viaUid = !!req.bookmark_uid
+    if (req.bookmark_uid) {
+      const ub = await this.bookmarkRepo.getUserBookmarkByUId(req.bookmark_uid, userId)
+      if (!ub) throw BookmarkNotFoundError()
+      bmId = ub.bookmark_id
+    } else {
+      bmId = ctx.hashIds.decodeId(req.bookmark_id ?? 0)
+      if (bmId < 1 || !bmId) throw ErrorParam()
+    }
 
     const bookmark = await this.bookmarkRepo.getUserBookmark(bmId, userId)
     if (!bookmark) throw BookmarkNotFoundError()
@@ -93,14 +110,18 @@ export class ShareService {
         res = await this.bookmarkRepo.updateBookmarkShare(bmId, userId, req.show_comment_line, req.show_userinfo, req.allow_action)
       } catch (err) {
         console.log(`update bookmark share failed: ${err}`)
-        return BookmarkNotFoundError()
+        // 必须抛出：之前 return 的错误对象会被丢弃，导致 res 为 undefined，下方取 res.allow_comment 抛 500
+        throw BookmarkNotFoundError()
       }
     }
     const createShare = async () => {
       for (let i = 0; i < 3; i++) {
-        const timeCode = ctx.hashIds.generateTimeCode()
-        const hash = (await hashMD5(`${bmId}-${userId}-${Date.now()}`)).slice(0, 7)
-        const code = `${timeCode}${hash}`
+        let code = ''
+        if (!viaUid) {
+          const timeCode = ctx.hashIds.generateTimeCode()
+          const hash = (await hashMD5(`${bmId}-${userId}-${Date.now()}`)).slice(0, 7)
+          code = `${timeCode}${hash}`
+        }
         const shareRes = await this.bookmarkRepo.createBookmarkShare(code, userId, bmId, req.show_comment_line, req.show_userinfo, req.allow_action)
         if (!shareRes) throw ServerError()
         res = shareRes
diff --git a/src/handler/http/aigcController.ts b/src/handler/http/aigcController.ts
index 1333948..e7afc8e 100644
--- a/src/handler/http/aigcController.ts
+++ b/src/handler/http/aigcController.ts
@@ -12,6 +12,7 @@ import { convertToGeminiContent } from '../../utils/conversation'
 
 type SummaryRequest = {
   bm_id?: number
+  bookmark_uid?: string
   share_code?: string
   cb_id?: number
   collection_code: string
@@ -21,6 +22,7 @@ type SummaryRequest = {
 
 type CompletionsRequest = {
   bm_id?: number
+  bookmark_uid?: string
   share_code?: string
   cb_id?: number
   collection_code?: string
@@ -52,11 +54,12 @@ export class AigcController {
     ctx.set('country', request.cf?.country || '')
     ctx.set('continent', request.cf?.continent || '')
 
-    if (!req.force && req.bm_id) {
+    if (!req.force && (req.bm_id || req.bookmark_uid)) {
       const summary = await this.bookmarkService.getUserBookmarkSummary(ctx, {
         bmId: req.bm_id,
         shareCode: req.share_code,
-        cbId: req.cb_id
+        cbId: req.cb_id,
+        bmUId: req.bookmark_uid
       })
 
       if (summary) {
@@ -66,7 +69,14 @@ export class AigcController {
       }
     }
 
-    const { title, content, bmId } = await this.bookmarkService.getBookmarkTitleContent(ctx, req.bm_id, req.share_code, req.cb_id, 'no title', req.raw_content)
+    const { title, content, bmId } = await this.bookmarkService.getBookmarkTitleContent(ctx, {
+      bmId: req.bm_id,
+      shareCode: req.share_code,
+      cbId: req.cb_id,
+      title: 'no title',
+      content: req.raw_content,
+      bmUId: req.bookmark_uid
+    })
     ctx.execution.waitUntil(
       aiSvc.bookmarkSummary(ctx, content, writable, async result => {
         bmId > 0 && (await this.bookmarkService.saveSummary(ctx, bmId, result.provider, result.response, result.model))
@@ -85,7 +95,14 @@ export class AigcController {
 
     const [user, { title, content, bmId }] = await Promise.all([
       this.userService.getUserInfo(ctx),
-      this.bookmarkService.getBookmarkTitleContent(ctx, req.bm_id, req.share_code, req.cb_id, req.title, req.raw_content)
+      this.bookmarkService.getBookmarkTitleContent(ctx, {
+        bmId: req.bm_id,
+        shareCode: req.share_code,
+        cbId: req.cb_id,
+        title: req.title,
+        content: req.raw_content,
+        bmUId: req.bookmark_uid
+      })
     ])
 
     // 设置上下文
diff --git a/src/handler/http/shareController.ts b/src/handler/http/shareController.ts
index ee8bdb1..2afcf01 100644
--- a/src/handler/http/shareController.ts
+++ b/src/handler/http/shareController.ts
@@ -66,10 +66,10 @@ export class ShareController {
    */
   @Get('/exists')
   public async existsShare(ctx: ContextManager, request: Request) {
-    const req = await RequestUtils.query<{ bookmark_id: number }>(request)
-    if (!req) return Failed(ErrorParam())
+    const req = await RequestUtils.query<{ bookmark_id?: number; bookmark_uid?: string }>(request)
+    if (!req || (!req.bookmark_id && !req.bookmark_uid)) return Failed(ErrorParam())
 
-    const res = await this.shareService.checkBookmarkShareExists(ctx, req.bookmark_id)
+    const res = await this.shareService.checkBookmarkShareExists(ctx, { bmId: req.bookmark_id, bmUId: req.bookmark_uid })
     return Successed(res)
   }
 
@@ -78,10 +78,12 @@ export class ShareController {
    */
   @Get('/mark_list')
   public async getMarkList(ctx: ContextManager, request: Request) {
-    const req = await RequestUtils.query<{ share_code: string }>(request)
-    if (!req) return Failed(ErrorParam())
+    const req = await RequestUtils.query<{ share_code?: string; bookmark_uid?: string }>(request)
+    if (!req || (!req.share_code && !req.bookmark_uid)) return Failed(ErrorParam())
 
-    const markList = await this.shareOrchestrator.getBookmarkShareMarkList(ctx, req.share_code)
+    const markList = req.bookmark_uid
+      ? await this.shareOrchestrator.getBookmarkShareMarkListByUid(ctx, req.bookmark_uid)
+      : await this.shareOrchestrator.getBookmarkShareMarkList(ctx, req.share_code!)
     return Successed(markList)
   }
 }
diff --git a/src/infra/repository/dbBookmark.ts b/src/infra/repository/dbBookmark.ts
index d6ab81d..70eb382 100644
--- a/src/infra/repository/dbBookmark.ts
+++ b/src/infra/repository/dbBookmark.ts
@@ -401,7 +401,8 @@ export class BookmarkRepo {
       })
     } catch (err) {
       console.log(`create bookmark share failed: ${err}`)
-      return CreateBookmarkShareUniqueFail()
+      // 失败要抛出，让上层走错误响应；之前 return 错误对象会被 createShare 当成 share 行，导致返回畸形 200
+      throw CreateBookmarkShareUniqueFail()
     }
   }