diff --git a/internal/infrastructure/cardobservation/pre_activation_settlement.go b/internal/infrastructure/cardobservation/pre_activation_settlement.go
index 0373437a..e42d3fed 100644
--- a/internal/infrastructure/cardobservation/pre_activation_settlement.go
+++ b/internal/infrastructure/cardobservation/pre_activation_settlement.go
@@ -47,6 +47,7 @@ func (s *PreActivationSettler) SettleBeforeActivation(ctx context.Context, carri
 	if hasMain {
 		return
 	}
+	s.logger.Info("激活前流量结算开始", zap.String("carrier_type", carrierType), zap.Uint("asset_id", carrierID))
 	cards, err := s.cardsOf(ctx, carrierType, carrierID)
 	if err != nil {
 		s.logger.Warn("激活前流量结算：查询载体下卡失败，跳过结算", zap.String("carrier_type", carrierType), zap.Uint("carrier_id", carrierID), zap.Error(err))
@@ -86,7 +87,7 @@ func (s *PreActivationSettler) settleCard(ctx context.Context, card *model.IotCa
 		resetDay = s.carrier.GetDataResetDay(stepCtx, card.CarrierID)
 	}
 	observedAt := time.Now().UTC()
-	_, err = s.observation.ApplyTrafficObservation(stepCtx, carddomain.TrafficObservation{
+	decision, err := s.observation.ApplyTrafficObservation(stepCtx, carddomain.TrafficObservation{
 		CardID: card.ID, GatewayReadingMB: float64(response.Used), ResetDay: resetDay,
 		Metadata: carddomain.ObservationMetadata{
 			ObservationID: "pre-activation-" + card.ICCID + "-" + observedAt.Format("20060102150405.000"),
@@ -96,7 +97,12 @@ func (s *PreActivationSettler) settleCard(ctx context.Context, card *model.IotCa
 	})
 	if err != nil {
 		s.alert(card, carrierType, carrierID, "流量结算入账失败")
+		return
 	}
+	s.logger.Info("激活前流量结算完成", zap.Uint("card_id", card.ID), zap.String("iccid", card.ICCID),
+		zap.String("carrier_type", carrierType), zap.Uint("asset_id", carrierID),
+		zap.Float64("gateway_flow_mb", float64(response.Used)), zap.Float64("increment_mb", decision.IncrementMB),
+		zap.String("metric", "package.pre_activation_settlement.done"))
 }
 
 // alert 写激活前结算失败告警：该卡本月可能多计无套餐期间用量，由运营核对。