The invention relates to lift of a closing point which affects the pressure grade of a condensate pump, in particular to a method for reducing the lift of the closing point of the condensate pump, and the method comprises the following steps: increasing the width of an outlet of an impeller of the condensate pump, and increasing the area of an inlet of a pump bowl, thereby increasing the flow rate of the condensate pump, leading a lift curve of the condensate pump to tend to be smooth, reducing the lift of the closing point and leading a pipeline system of the condensate pump to select the lower pressure grade. The method only changes the shapes of individual parts without changing the structure of the pump; the method is simple, easy to realize and strong in operatability; and the methodcan reduce the lift of the closing point under the premise of not increasing the manufacturing cost and have better technical and economic effects.