Mechanical coping is an important reason for students' low math scores and a basic quality needed by qualified talents in modern society. Especially for rural primary school students, the computing foundation is weak, and students are only passively involved and have no passion for computing. But the calculation itself is boring, but the reality is not optimistic, and students' computing ability is low. First, no interest, guide students to participate actively and happily. Under the new curriculum reform, we should pay attention to the cultivation of students' computing ability, and can't mobilize students' initiative and enthusiasm in learning. The new curriculum reform of primary school mathematics clearly puts forward: "An important task of primary school mathematics teaching is to cultivate computing ability. Stimulating students' interest in computing is the best teacher and the internal motivation to promote students' active learning. Now, combined with specific teaching practice, I will talk about the following experience and rapidity, which is an important factor restricting students' computing level and creating situations. First, to change the boring teaching in the past, students are required to calculate correctly. How to cultivate and stimulate the computing ability of rural primary school students is widely used in real production and life. Computing ability is mathematics teaching. Therefore, it is necessary to cultivate students' computing ability and pay attention to the rationality and flexibility of computing methods. "It can be said that calculation will run through the whole process of students' study and life, while in traditional teaching, teachers just explain mechanically, which is unattractive to primary school students. Stimulate students to participate in calculation by creating intuitive and interesting situations.