diff --git a/epmet-module/gov-project/gov-project-server/src/main/resources/db/migration/V0.0.5__create_project_attachment.sql b/epmet-module/gov-project/gov-project-server/src/main/resources/db/migration/V0.0.5__create_project_attachment.sql
index 6dd706bf39..9e5d387472 100644
--- a/epmet-module/gov-project/gov-project-server/src/main/resources/db/migration/V0.0.5__create_project_attachment.sql
+++ b/epmet-module/gov-project/gov-project-server/src/main/resources/db/migration/V0.0.5__create_project_attachment.sql
@@ -7,7 +7,7 @@ CREATE TABLE `project_process_attachment` (
   `FILE_PLACE` varchar(64) NOT NULL COMMENT '文件所属位置(内部备注: internal 公开答复:public)',
   `FILE_NAME` varchar(255) DEFAULT NULL COMMENT '文件名',
   `ATTACHMENT_NAME` varchar(255) DEFAULT NULL COMMENT '附件名（uuid随机生成）',
-  `ATTACHMENT_SIZE` int(11) DEFAULT NULL COMMENT '文件大小',
+  `ATTACHMENT_SIZE` int(11) DEFAULT NULL COMMENT '文件大小，单位b',
   `ATTACHMENT_FORMAT` varchar(64) DEFAULT NULL COMMENT '文件格式（JPG、PNG、JPEG、BMP、GIF、PDF、PPT、PPTX、DOC、DOCX、XLS、XLSX、MP3、WMA、M4A、MP4、AVI、MOV、RMVB、RM、WMV）',
   `ATTACHMENT_TYPE` varchar(64) DEFAULT NULL COMMENT '文件类型（（图片 - image、 视频 - video、 语音 - voice、 文档 - doc））',
   `ATTACHMENT_URL` varchar(255) NOT NULL COMMENT 'url地址',