diff --git a/yuthon_property_approval/models/property_lease_contract.py b/yuthon_property_approval/models/property_lease_contract.py
index c7f47ecc6..d5a856172 100644
--- a/yuthon_property_approval/models/property_lease_contract.py
+++ b/yuthon_property_approval/models/property_lease_contract.py
@@ -386,7 +386,7 @@ class PropertyLeaseContract(models.Model):
             }
         }
 
-    @api.onchange("term_start_time", "term_end_time",
+    @api.onchange("term_start_time", "term_end_time", "rent",
                   "increments_every_few_years", "unit_price",
                   "first_years_begin",  "increment_method", "increment_value",
                   "rent_free_period_month", "rent_free_period_days", "total_area")
@@ -417,7 +417,7 @@ class PropertyLeaseContract(models.Model):
 
         unit_price = self.unit_price  # 单价
         unit_price = float_round(unit_price, precision_digits=2, rounding_method='HALF-UP')
-        monthly_amount = self.total_area * unit_price
+        monthly_amount = self.rent
         monthly_amount = float_round(monthly_amount, precision_digits=0, rounding_method='HALF-UP')  # 月租金