diff --git a/backend/services/contribution-service/src/application/services/contribution-calculation.service.ts b/backend/services/contribution-service/src/application/services/contribution-calculation.service.ts
index ebe028a4..d21899ca 100644
--- a/backend/services/contribution-service/src/application/services/contribution-calculation.service.ts
+++ b/backend/services/contribution-service/src/application/services/contribution-calculation.service.ts
@@ -113,6 +113,39 @@ export class ContributionCalculationService {
         `teamBonus=${result.teamBonusRecords.length}, ` +
         `unallocated=${result.unallocatedContributions.length}`,
     );
+
+    // 发布全网进度更新事件（用于 mining-service 同步全网理论算力）
+    await this.publishNetworkProgressEvent();
+  }
+
+  /**
+   * 发布全网进度更新事件
+   */
+  private async publishNetworkProgressEvent(): Promise<void> {
+    try {
+      const progress = await this.contributionRateService.getNetworkProgress();
+
+      const event = new NetworkProgressUpdatedEvent(
+        progress.totalTreeCount,
+        progress.totalAdoptionOrders,
+        progress.totalAdoptedUsers,
+        progress.currentUnit,
+        progress.currentMultiplier.toString(),
+        progress.currentContributionPerTree.toString(),
+        progress.nextUnitTreeCount,
+      );
+
+      await this.outboxRepository.save({
+        aggregateType: NetworkProgressUpdatedEvent.AGGREGATE_TYPE,
+        aggregateId: 'network',
+        eventType: NetworkProgressUpdatedEvent.EVENT_TYPE,
+        payload: event.toPayload(),
+      });
+
+      this.logger.debug(`Published NetworkProgressUpdatedEvent: trees=${progress.totalTreeCount}`);
+    } catch (error) {
+      this.logger.error('Failed to publish NetworkProgressUpdatedEvent', error);
+    }
   }
 
   /**
diff --git a/backend/services/mining-service/src/application/schedulers/mining.scheduler.ts b/backend/services/mining-service/src/application/schedulers/mining.scheduler.ts
index a393fbee..b3003018 100644
--- a/backend/services/mining-service/src/application/schedulers/mining.scheduler.ts
+++ b/backend/services/mining-service/src/application/schedulers/mining.scheduler.ts
@@ -118,9 +118,10 @@ export class MiningScheduler implements OnModuleInit {
   }
 
   /**
-   * 每分钟同步全网数据（系统账户算力、全网理论算力）
+   * 每5分钟同步全网数据（兜底方案，防止 Kafka 事件丢失）
+   * 正常情况下由 Kafka 事件驱动实时同步
    */
-  @Cron(CronExpression.EVERY_MINUTE)
+  @Cron(CronExpression.EVERY_5_MINUTES)
   async syncNetworkData(): Promise<void> {
     const lockValue = await this.redis.acquireLock('mining:network-sync:lock', 30);
     if (!lockValue) {