The invention provides a method with effects of saving cost and improving efficiency for liquid pollination of pear tree, which belongs to the fruit trees production technical field. The method comprises the following steps: preparing a nutrient solution in full-bloom stage of pear flowers, adding 0.8g pure pollen in every liter of nutrient solution, spraying and pollinating by an electrostatic sprayer to achieve the purpose of artificial pollination. The pollination method has the advantages of simple operation, fast pollination speed, uniform powder injection, concentration, accuracy, pollen and manual work saving, low cost and the like, and solves the practical problems that pollen can not be uniformly dissolved in water in liquid pollination of fruit trees, pollen is easy to adhere with the wall of a container, pollen is obstructed a nozzle, uneven powder injection causes poor pollination effect and the real application of liquid pollination can not be realized for a long time. According to the invention, the new collected pure pollen (germination rate is 60%-80%) in current year required by per mu is 8-11g. In addition, the method of the invention is capable of increasing the moisture and nutrient of pistil stigma and prolonging the fecundation time of stigma pollination, and the fruit quality can not be affected by increasing the fruit setting rate.