diff --git a/yuthon_property_approval/models/property_lease_contract.py b/yuthon_property_approval/models/property_lease_contract.py
index f63b6ce0a..9259a85d4 100644
--- a/yuthon_property_approval/models/property_lease_contract.py
+++ b/yuthon_property_approval/models/property_lease_contract.py
@@ -686,9 +686,9 @@ class PropertyLeaseContract(models.Model):
                     monthly_amount = self.total_area * unit_price
                     monthly_amount = float_round(monthly_amount, precision_digits=0, rounding_method='HALF-UP')  # 月租金
                 if self.increment_method == "percentage" and self.increment_value:
-                    monthly_amount = monthly_amount * (1 + (self.increment_value / 100))
+                    unit_price = unit_price * (1 + (self.increment_value / 100))
+                    monthly_amount = self.total_area * unit_price
                     monthly_amount = float_round(monthly_amount, precision_digits=0, rounding_method='HALF-UP')  # 月租金
-                    unit_price = monthly_amount / self.total_area
                 if self.increment_method == "increment_amount" and self.increment_value:
                     monthly_amount = monthly_amount + self.increment_value
                     monthly_amount = float_round(monthly_amount, precision_digits=0, rounding_method='HALF-UP')  # 月租金