diff --git a/api/v1/system/tenant.go b/api/v1/system/tenant.go
index 8f85120..0d63b98 100644
--- a/api/v1/system/tenant.go
+++ b/api/v1/system/tenant.go
@@ -51,6 +51,7 @@ type TenantEditReq struct {
 	TenantType      consts.TenantType `p:"tenantType"`
 	CityCode        string            `p:"cityCode"`
 	BusinessLicense string            `p:"businessLicense"`
+	Surplus         float64           `p:"surplus"`
 	commonApi.Author
 }
 
diff --git a/internal/app/system/dao/internal/tenant.go b/internal/app/system/dao/internal/tenant.go
index 1fbade7..f85005e 100644
--- a/internal/app/system/dao/internal/tenant.go
+++ b/internal/app/system/dao/internal/tenant.go
@@ -30,6 +30,7 @@ type TenantColumns struct {
 	CityCode        string // 城市编码
 	BusinessLicense string // 营业执照
 	TenantSource    string // 租户来源
+	Surplus         string // 剩余金额
 }
 
 // tenantColumns holds the columns for table sys_user.
@@ -44,6 +45,7 @@ var tenantColumns = TenantColumns{
 	CityCode:        "city_code",
 	BusinessLicense: "business_license",
 	TenantSource:    "tenant_source",
+	Surplus:         "surplus",
 }
 
 // NewTenantDao creates and returns a new DAO object for table data access.
diff --git a/internal/app/system/logic/tenant/tenant.go b/internal/app/system/logic/tenant/tenant.go
index 904fd69..214d561 100644
--- a/internal/app/system/logic/tenant/tenant.go
+++ b/internal/app/system/logic/tenant/tenant.go
@@ -258,7 +258,18 @@ func (s *sTenant) Edit(ctx context.Context, req *system.TenantEditReq) (err erro
 			if !g.IsEmpty(req.TenantType) {
 				tenant.TenantType = req.TenantType
 			}
-			_, err = dao.TenantDao.Ctx(ctx).TX(tx).WherePri(req.Id).Update(tenant)
+			_, err = dao.TenantDao.Ctx(ctx).TX(tx).WherePri(req.Id).OmitEmpty().Update(tenant)
+			// 第二步：单独执行 Surplus 自增/自减（纯Counter，官方标准用法）
+			if !g.IsEmpty(req.Surplus) {
+				delta := gconv.Float64(req.Surplus)
+				_, err = dao.TenantDao.Ctx(ctx).TX(tx).WherePri(req.Id).Data(
+					dao.TenantDao.Columns().Surplus,
+					&gdb.Counter{
+						Field: dao.TenantDao.Columns().Surplus,
+						Value: delta,
+					},
+				).Update()
+			}
 			liberr.ErrIsNil(ctx, err, "修改租户信息失败")
 		})
 		return err
diff --git a/internal/app/system/model/do/tenant.go b/internal/app/system/model/do/tenant.go
index d9ffc25..595347b 100644
--- a/internal/app/system/model/do/tenant.go
+++ b/internal/app/system/model/do/tenant.go
@@ -23,4 +23,5 @@ type Tenant struct {
 	BusinessLicense interface{} // 营业执照
 	TenantSource    interface{} // 租户来源
 	AdminBy         interface{} // 管理者
+	Surplus         interface{} // 剩余金额
 }
diff --git a/internal/app/system/model/entity/tenant.go b/internal/app/system/model/entity/tenant.go
index 028461f..4f4c07e 100644
--- a/internal/app/system/model/entity/tenant.go
+++ b/internal/app/system/model/entity/tenant.go
@@ -22,4 +22,5 @@ type Tenant struct {
 	BusinessLicense string            `json:"businessLicense"     description:"营业执照"`
 	TenantSource    uint64            `json:"tenantSource"     description:"租户来源"`
 	AdminBy         uint64            `json:"adminBy"      description:"管理者"`
+	Surplus         float64           `json:"surplus"      description:"剩余金额"`
 }