diff --git a/fastapi_modules/fastapi_leaudit/domian/vo/crossReviewVo.py b/fastapi_modules/fastapi_leaudit/domian/vo/crossReviewVo.py
index 31d4768..4e1c7b1 100644
--- a/fastapi_modules/fastapi_leaudit/domian/vo/crossReviewVo.py
+++ b/fastapi_modules/fastapi_leaudit/domian/vo/crossReviewVo.py
@@ -51,6 +51,8 @@ class CrossReviewTaskDocumentVO(BaseModel):
     processingStatus: str | None = Field(None, description="处理状态")
     versionNo: int = Field(1, description="版本号")
     isLatestVersion: bool = Field(True, description="是否最新版本")
+    versionGroupKey: str = Field("", description="版本组Key")
+    totalVersions: int = Field(1, description="版本组总版本数")
     auditStatus: int = Field(0, description="任务内完成状态")
     createdAt: datetime | None = Field(None, description="创建时间")
     fileSize: int = Field(0, description="文件大小（字节）")
diff --git a/fastapi_modules/fastapi_leaudit/services/impl/crossReviewServiceImpl.py b/fastapi_modules/fastapi_leaudit/services/impl/crossReviewServiceImpl.py
index 1bc80c2..ead14c9 100644
--- a/fastapi_modules/fastapi_leaudit/services/impl/crossReviewServiceImpl.py
+++ b/fastapi_modules/fastapi_leaudit/services/impl/crossReviewServiceImpl.py
@@ -448,6 +448,8 @@ class CrossReviewServiceImpl(ICrossReviewService):
                             ) AS processing_status,
                             d.version_no,
                             d.is_latest_version,
+                            COALESCE(d.version_group_key, '') AS version_group_key,
+                            COALESCE(vc.total_versions, 1)::int AS total_versions,
                             d.created_at,
                             td.audit_status,
                             COALESCE(dt.name, '') AS type_name,
@@ -466,6 +468,12 @@ class CrossReviewServiceImpl(ICrossReviewService):
                             ORDER BY id ASC
                             LIMIT 1
                         ) df ON TRUE
+                        LEFT JOIN (
+                            SELECT version_group_key, COUNT(*) AS total_versions
+                            FROM leaudit_documents
+                            WHERE deleted_at IS NULL
+                            GROUP BY version_group_key
+                        ) vc ON vc.version_group_key = d.version_group_key
                         WHERE {whereSql}
                         ORDER BY d.created_at DESC, d.id DESC
                         LIMIT :limit OFFSET :offset
@@ -485,6 +493,8 @@ class CrossReviewServiceImpl(ICrossReviewService):
                     processingStatus=row.get("processing_status"),
                     versionNo=int(row.get("version_no") or 1),
                     isLatestVersion=bool(row.get("is_latest_version")),
+                    versionGroupKey=str(row.get("version_group_key") or ""),
+                    totalVersions=int(row.get("total_versions") or 1),
                     auditStatus=int(row.get("audit_status") or 0),
                     createdAt=row.get("created_at"),
                     fileSize=int(row.get("file_size") or 0),
@@ -901,6 +911,30 @@ class CrossReviewServiceImpl(ICrossReviewService):
             await self._ensure_tables_ready(session)
             await self._reset_transaction_for_write(session)
             async with session.begin():
+                # If this is v{n>1}, retire previous versions in this task
+                if uploadResult.versionNo > 1 and uploadResult.versionGroupKey:
+                    await session.execute(
+                        text(
+                            """
+                            UPDATE leaudit_cross_review_task_documents
+                            SET delete_time = NOW()
+                            WHERE task_id = :task_id
+                              AND delete_time IS NULL
+                              AND document_id IN (
+                                SELECT id FROM leaudit_documents
+                                WHERE version_group_key = :group_key
+                                  AND deleted_at IS NULL
+                                  AND id != :new_doc_id
+                              )
+                            """
+                        ),
+                        {
+                            "task_id": TaskId,
+                            "group_key": uploadResult.versionGroupKey,
+                            "new_doc_id": uploadResult.documentId,
+                        },
+                    )
+
                 exists = bool(
                     await session.scalar(
                         text(