diff --git a/backend/services/identity-service/src/domain/services/index.ts b/backend/services/identity-service/src/domain/services/index.ts
index 7e72252a..a72f25b7 100644
--- a/backend/services/identity-service/src/domain/services/index.ts
+++ b/backend/services/identity-service/src/domain/services/index.ts
@@ -46,9 +46,11 @@ export class UserValidatorService {
   }
 
   async checkDeviceNotRegistered(deviceId: string): Promise<ValidationResult> {
-    const existing = await this.repository.findByDeviceId(deviceId);
-    if (existing) return ValidationResult.failure('该设备已创建过账户');
+    // TODO: 暂时禁用设备检查，允许同一设备创建多个账户
     return ValidationResult.success();
+    // const existing = await this.repository.findByDeviceId(deviceId);
+    // if (existing) return ValidationResult.failure('该设备已创建过账户');
+    // return ValidationResult.success();
   }
 
   async validateReferralCode(referralCode: ReferralCode): Promise<ValidationResult> {
diff --git a/backend/services/identity-service/src/domain/services/user-validator.service.ts b/backend/services/identity-service/src/domain/services/user-validator.service.ts
index 0f0e8c75..b2821849 100644
--- a/backend/services/identity-service/src/domain/services/user-validator.service.ts
+++ b/backend/services/identity-service/src/domain/services/user-validator.service.ts
@@ -31,9 +31,11 @@ export class UserValidatorService {
   }
 
   async checkDeviceNotRegistered(deviceId: string): Promise<ValidationResult> {
-    const existing = await this.repository.findByDeviceId(deviceId);
-    if (existing) return ValidationResult.failure('该设备已创建过账户');
+    // TODO: 暂时禁用设备检查，允许同一设备创建多个账户
     return ValidationResult.success();
+    // const existing = await this.repository.findByDeviceId(deviceId);
+    // if (existing) return ValidationResult.failure('该设备已创建过账户');
+    // return ValidationResult.success();
   }
 
   async validateReferralCode(referralCode: ReferralCode): Promise<ValidationResult> {