diff --git a/backend/services/contribution-service/src/application/services/bonus-claim.service.ts b/backend/services/contribution-service/src/application/services/bonus-claim.service.ts
index 856f536e..7f812898 100644
--- a/backend/services/contribution-service/src/application/services/bonus-claim.service.ts
+++ b/backend/services/contribution-service/src/application/services/bonus-claim.service.ts
@@ -2,13 +2,14 @@ import { Injectable, Logger } from '@nestjs/common';
 import { UnallocatedContributionRepository, UnallocatedContribution } from '../../infrastructure/persistence/repositories/unallocated-contribution.repository';
 import { ContributionAccountRepository } from '../../infrastructure/persistence/repositories/contribution-account.repository';
 import { ContributionRecordRepository } from '../../infrastructure/persistence/repositories/contribution-record.repository';
+import { SystemAccountRepository } from '../../infrastructure/persistence/repositories/system-account.repository';
 import { OutboxRepository } from '../../infrastructure/persistence/repositories/outbox.repository';
 import { UnitOfWork } from '../../infrastructure/persistence/unit-of-work/unit-of-work';
 import { ContributionRecordAggregate } from '../../domain/aggregates/contribution-record.aggregate';
 import { ContributionSourceType } from '../../domain/aggregates/contribution-account.aggregate';
 import { ContributionAmount } from '../../domain/value-objects/contribution-amount.vo';
 import { DistributionRate } from '../../domain/value-objects/distribution-rate.vo';
-import { ContributionRecordSyncedEvent } from '../../domain/events';
+import { ContributionRecordSyncedEvent, SystemAccountSyncedEvent } from '../../domain/events';
 
 /**
  * 奖励补发服务
@@ -22,6 +23,7 @@ export class BonusClaimService {
     private readonly unallocatedContributionRepository: UnallocatedContributionRepository,
     private readonly contributionAccountRepository: ContributionAccountRepository,
     private readonly contributionRecordRepository: ContributionRecordRepository,
+    private readonly systemAccountRepository: SystemAccountRepository,
     private readonly outboxRepository: OutboxRepository,
     private readonly unitOfWork: UnitOfWork,
   ) {}
@@ -135,7 +137,36 @@ export class BonusClaimService {
     const pendingIds = pendingRecords.map((r) => r.id);
     await this.unallocatedContributionRepository.claimBonusRecords(pendingIds, accountSequence);
 
-    // 6. 发布事件到 Kafka（通过 Outbox）
+    // 6. 从 HEADQUARTERS 减少算力并删除明细记录
+    await this.systemAccountRepository.subtractContribution('HEADQUARTERS', null, totalAmount);
+    for (const pending of pendingRecords) {
+      await this.systemAccountRepository.deleteContributionRecordsByAdoption(
+        'HEADQUARTERS',
+        null,
+        pending.sourceAdoptionId,
+        pending.sourceAccountSequence,
+      );
+    }
+
+    // 7. 发布 HEADQUARTERS 账户更新事件
+    const headquartersAccount = await this.systemAccountRepository.findByTypeAndRegion('HEADQUARTERS', null);
+    if (headquartersAccount) {
+      const hqEvent = new SystemAccountSyncedEvent(
+        'HEADQUARTERS',
+        null,
+        headquartersAccount.name,
+        headquartersAccount.contributionBalance.value.toString(),
+        headquartersAccount.createdAt,
+      );
+      await this.outboxRepository.save({
+        aggregateType: SystemAccountSyncedEvent.AGGREGATE_TYPE,
+        aggregateId: 'HEADQUARTERS',
+        eventType: SystemAccountSyncedEvent.EVENT_TYPE,
+        payload: hqEvent.toPayload(),
+      });
+    }
+
+    // 8. 发布事件到 Kafka（通过 Outbox）
     await this.publishBonusClaimEvents(accountSequence, savedRecords, pendingRecords);
 
     this.logger.log(
diff --git a/backend/services/contribution-service/src/infrastructure/persistence/repositories/system-account.repository.ts b/backend/services/contribution-service/src/infrastructure/persistence/repositories/system-account.repository.ts
index 23a2eee1..05382b47 100644
--- a/backend/services/contribution-service/src/infrastructure/persistence/repositories/system-account.repository.ts
+++ b/backend/services/contribution-service/src/infrastructure/persistence/repositories/system-account.repository.ts
@@ -165,6 +165,56 @@ export class SystemAccountRepository {
     return `${regionCode}账户`;
   }
 
+  /**
+   * 减少系统账户算力
+   */
+  async subtractContribution(
+    accountType: SystemAccountType,
+    regionCode: string | null,
+    amount: ContributionAmount,
+  ): Promise<void> {
+    const existing = await this.client.systemAccount.findFirst({
+      where: {
+        accountType,
+        regionCode: regionCode === null ? { equals: null } : regionCode,
+      },
+    });
+
+    if (existing) {
+      await this.client.systemAccount.update({
+        where: { id: existing.id },
+        data: {
+          contributionBalance: { decrement: amount.value },
+        },
+      });
+    }
+  }
+
+  /**
+   * 删除指定来源认种的明细记录
+   */
+  async deleteContributionRecordsByAdoption(
+    accountType: SystemAccountType,
+    regionCode: string | null,
+    sourceAdoptionId: bigint,
+    sourceAccountSequence: string,
+  ): Promise<number> {
+    const systemAccount = await this.findByTypeAndRegion(accountType, regionCode);
+    if (!systemAccount) {
+      return 0;
+    }
+
+    const result = await this.client.systemContributionRecord.deleteMany({
+      where: {
+        systemAccountId: systemAccount.id,
+        sourceAdoptionId,
+        sourceAccountSequence,
+      },
+    });
+
+    return result.count;
+  }
+
   async saveContributionRecord(record: {
     accountType: SystemAccountType;
     regionCode: string | null;