diff --git a/.gitignore b/.gitignore
index 7645c834..13e28fc6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -48,6 +48,20 @@ tmp/
 temp/
 *.tmp
 
+# Database backups (large files, backup locally only)
+*.sql
+!backend/prisma/migrations/**/*.sql
+!backend/prisma/manual-migrations/**/*.sql
+!backend/scripts/**/*.sql
+backup_*.sql
+*_backup_*.sql
+*_backup_*.tar
+postgres_volume_backup_*.tar
+
+# Source code archives
+*.tar.gz
+pgvector-*.tar.gz
+
 # Backend uploads (用户上传的文件，不应提交到Git)
 backend/uploads/
 
diff --git a/backup_before_pgvector_20260119.sql b/backup_before_pgvector_20260119.sql
deleted file mode 100644
index 39470b21..00000000
Binary files a/backup_before_pgvector_20260119.sql and /dev/null differ
diff --git a/pgvector-0.8.0.tar.gz b/pgvector-0.8.0.tar.gz
deleted file mode 100644
index 86e71562..00000000
Binary files a/pgvector-0.8.0.tar.gz and /dev/null differ
diff --git a/postgres_volume_backup_20260119.tar b/postgres_volume_backup_20260119.tar
deleted file mode 100644
index e1a410dc..00000000
Binary files a/postgres_volume_backup_20260119.tar and /dev/null differ