diff --git a/install.sh b/install.sh
index 9f2fbba..8646c32 100644
--- a/install.sh
+++ b/install.sh
@@ -3328,10 +3328,52 @@ update_pull_latest_code() {
         cp -r "/tmp/${PROJECT_NAME}-update/frontend" "${PROJECT_DIR}/"
     fi
 
-    # 更新上传工具
+    # 更新上传工具 - 询问用户是否保留
     if [[ -d "/tmp/${PROJECT_NAME}-update/upload-tool" ]]; then
-        rm -rf "${PROJECT_DIR}/upload-tool"
-        cp -r "/tmp/${PROJECT_NAME}-update/upload-tool" "${PROJECT_DIR}/"
+        # 检查是否已存在上传工具可执行文件
+        if [[ -f "${PROJECT_DIR}/upload-tool/dist/玩玩云上传工具.exe" ]]; then
+            FILE_SIZE=$(stat -f%z "${PROJECT_DIR}/upload-tool/dist/玩玩云上传工具.exe" 2>/dev/null || stat -c%s "${PROJECT_DIR}/upload-tool/dist/玩玩云上传工具.exe" 2>/dev/null || echo "0")
+            if [[ $FILE_SIZE -gt 30000000 ]]; then
+                FILE_SIZE_MB=$(( FILE_SIZE / 1024 / 1024 ))
+                echo ""
+                print_info "检测到已存在上传工具（${FILE_SIZE_MB}MB）"
+                echo ""
+                echo "╔════════════════════════════════════════════════════════════╗"
+                echo "║                   上传工具更新选项                         ║"
+                echo "╠════════════════════════════════════════════════════════════╣"
+                echo "║  1) 保留现有上传工具（推荐，节省下载时间）                ║"
+                echo "║  2) 删除并重新下载（如果工具有更新）                      ║"
+                echo "╚════════════════════════════════════════════════════════════╝"
+                echo ""
+                read -p "▶ 请选择 [1/2, 默认:1]: " KEEP_UPLOAD_TOOL
+                KEEP_UPLOAD_TOOL=${KEEP_UPLOAD_TOOL:-1}
+
+                if [[ "$KEEP_UPLOAD_TOOL" == "1" ]]; then
+                    print_success "保留现有上传工具"
+                    # 只更新upload-tool目录的脚本文件，保留dist目录
+                    mkdir -p "${PROJECT_DIR}/upload-tool-temp"
+                    cp -r "${PROJECT_DIR}/upload-tool/dist" "${PROJECT_DIR}/upload-tool-temp/"
+                    rm -rf "${PROJECT_DIR}/upload-tool"
+                    cp -r "/tmp/${PROJECT_NAME}-update/upload-tool" "${PROJECT_DIR}/"
+                    rm -rf "${PROJECT_DIR}/upload-tool/dist"
+                    mv "${PROJECT_DIR}/upload-tool-temp/dist" "${PROJECT_DIR}/upload-tool/"
+                    rm -rf "${PROJECT_DIR}/upload-tool-temp"
+                    print_success "已保留现有上传工具，仅更新脚本文件"
+                else
+                    print_info "将在后续步骤重新下载上传工具..."
+                    rm -rf "${PROJECT_DIR}/upload-tool"
+                    cp -r "/tmp/${PROJECT_NAME}-update/upload-tool" "${PROJECT_DIR}/"
+                fi
+            else
+                print_warning "现有上传工具文件大小异常，将重新下载..."
+                rm -rf "${PROJECT_DIR}/upload-tool"
+                cp -r "/tmp/${PROJECT_NAME}-update/upload-tool" "${PROJECT_DIR}/"
+            fi
+        else
+            # 不存在上传工具，直接复制
+            rm -rf "${PROJECT_DIR}/upload-tool"
+            cp -r "/tmp/${PROJECT_NAME}-update/upload-tool" "${PROJECT_DIR}/"
+        fi
     fi
 
     # 更新后端代码文件（但不覆盖 data、storage、.env）