diff --git a/backend/services/contribution-service/src/api/dto/request/snapshot.request.ts b/backend/services/contribution-service/src/api/dto/request/snapshot.request.ts
index c0512379..737071ef 100644
--- a/backend/services/contribution-service/src/api/dto/request/snapshot.request.ts
+++ b/backend/services/contribution-service/src/api/dto/request/snapshot.request.ts
@@ -15,10 +15,6 @@ export class GetSnapshotRequest {
 }
 
 export class GetBatchRatiosRequest {
-  @ApiProperty({ description: '快照日期 (YYYY-MM-DD)' })
-  @IsDateString()
-  snapshotDate: string;
-
   @ApiPropertyOptional({ description: '页码', default: 1 })
   @IsOptional()
   @Type(() => Number)