diff --git a/backend/internal/modules/adminfinance/helper.go b/backend/internal/modules/adminfinance/helper.go
index c43e012..8c30ac4 100644
--- a/backend/internal/modules/adminfinance/helper.go
+++ b/backend/internal/modules/adminfinance/helper.go
@@ -53,7 +53,7 @@ func normalRefundBizTypes() []string {
 // settledSettlementStatuses 是视为"已完成结算"的结算状态集合。
 // 预计收入只统计尚未结算的订单,这些状态需从预计口径中排除。
 func settledSettlementStatuses() []string {
-	return []string{"settled", "closed"}
+	return []string{"settled", "closed", "arbitrated"}
 }
 
 // nonBillableOrderStatuses 是不产生平台收入的订单状态集合(待支付、已取消、已关闭)。
diff --git a/backend/internal/modules/adminfinance/helper_test.go b/backend/internal/modules/adminfinance/helper_test.go
index 3fcedea..adc850f 100644
--- a/backend/internal/modules/adminfinance/helper_test.go
+++ b/backend/internal/modules/adminfinance/helper_test.go
@@ -45,3 +45,15 @@ func TestRefundBizTypesIncludeMohongRefund(t *testing.T) {
 		t.Fatal("refundBizTypes missing mohong_refund")
 	}
 }
+
+func TestSettledSettlementStatusesIncludeArbitrated(t *testing.T) {
+	values := map[string]bool{}
+	for _, item := range settledSettlementStatuses() {
+		values[item] = true
+	}
+	for _, want := range []string{"settled", "closed", "arbitrated"} {
+		if !values[want] {
+			t.Fatalf("settledSettlementStatuses missing %s", want)
+		}
+	}
+}
diff --git a/backend/internal/modules/order/constants.go b/backend/internal/modules/order/constants.go
index 29bae02..cab53be 100644
--- a/backend/internal/modules/order/constants.go
+++ b/backend/internal/modules/order/constants.go
@@ -32,11 +32,12 @@ const (
 	handoffStatusAdminClosed                 = "admin_closed"
 	handoffStatusAdminAbnormal               = "admin_abnormal"
 
-	settlementStatusUnsettled = "unsettled"
-	settlementStatusPending   = "pending"
-	settlementStatusSettled   = "settled"
-	settlementStatusClosed    = "closed"
-	settlementStatusDisputed  = "disputed"
+	settlementStatusUnsettled  = "unsettled"
+	settlementStatusPending    = "pending"
+	settlementStatusSettled    = "settled"
+	settlementStatusClosed     = "closed"
+	settlementStatusDisputed   = "disputed"
+	settlementStatusArbitrated = "arbitrated"
 
 	handoffModeOwner    = "owner"
 	handoffModePlatform = "platform"
diff --git a/backend/internal/modules/order/platform_managed.go b/backend/internal/modules/order/platform_managed.go
index c7bffbb..2c0b07b 100644
--- a/backend/internal/modules/order/platform_managed.go
+++ b/backend/internal/modules/order/platform_managed.go
@@ -66,7 +66,7 @@ func canAdminPlatformCheckoutConfirm(order model.RentalOrder) bool {
 func canAdminMarkOfflineSettlement(order model.RentalOrder) bool {
 	return isPlatformSettlementOrder(order) &&
 		order.Status == orderStatusCompleted &&
-		order.SettlementStatus == settlementStatusSettled &&
+		(order.SettlementStatus == settlementStatusSettled || order.SettlementStatus == settlementStatusArbitrated) &&
 		effectiveOfflineSettlementStatus(order) == offlineSettlementStatusPending &&
 		order.OfflineSettlementAmountCent > 0
 }
diff --git a/backend/internal/modules/order/repository_integration_test.go b/backend/internal/modules/order/repository_integration_test.go
index 835e1b8..c939399 100644
--- a/backend/internal/modules/order/repository_integration_test.go
+++ b/backend/internal/modules/order/repository_integration_test.go
@@ -1580,6 +1580,46 @@ func TestAdminPlatformCheckoutCounterCanBeAcceptedByRenter(t *testing.T) {
 	}
 }
 
+func TestAdminMarkOfflineSettlementAllowsArbitratedPlatformOrder(t *testing.T) {
+	db := setupOrderTestDB(t)
+	repo := NewRepository(db)
+	adminID := uint64(79)
+	order := model.RentalOrder{
+		OrderNo:                     "ORD-OFFLINE-ARBITRATED-001",
+		ListingID:                   1,
+		AccountID:                   1,
+		OwnerID:                     1,
+		RenterID:                    2,
+		Status:                      orderStatusCompleted,
+		SettlementStatus:            settlementStatusArbitrated,
+		HandoffMode:                 handoffModePlatform,
+		SettlementMode:              settlementModePlatformManaged,
+		OfflineSettlementStatus:     offlineSettlementStatusPending,
+		OfflineSettlementAmountCent: 8000,
+	}
+	if err := db.Create(&order).Error; err != nil {
+		t.Fatalf("create order failed: %v", err)
+	}
+
+	if !canAdminMarkOfflineSettlement(order) {
+		t.Fatal("arbitrated platform order should allow offline settlement")
+	}
+	if err := repo.AdminMarkOfflineSettlement(t.Context(), adminID, order.ID, OfflineSettlementRequest{Remark: "仲裁后线下转账"}, AuditMeta{}); err != nil {
+		t.Fatalf("AdminMarkOfflineSettlement() error = %v", err)
+	}
+
+	var saved model.RentalOrder
+	if err := db.First(&saved, order.ID).Error; err != nil {
+		t.Fatalf("load order failed: %v", err)
+	}
+	if saved.OfflineSettlementStatus != offlineSettlementStatusSettled {
+		t.Fatalf("offline settlement status = %q, want %q", saved.OfflineSettlementStatus, offlineSettlementStatusSettled)
+	}
+	if saved.OfflineSettledBy == nil || *saved.OfflineSettledBy != adminID {
+		t.Fatalf("offline settled by = %#v, want %d", saved.OfflineSettledBy, adminID)
+	}
+}
+
 func TestPlatformManagedCheckoutIncludesConsumableAndDepositCompensation(t *testing.T) {
 	db := setupOrderTestDB(t)
 	repo := NewRepository(db)