First, cultivate students' interest in learning. Psychologist Bruner believes that the best stimulus to learning is interest in the materials learned. The success of teaching depends largely on students' interest in learning. Mathematics is boring when it is only represented by Arabic numerals; Mathematics is abstract when it can only be presented by a bunch of conceptual principles; When learning mathematics becomes an endless exercise, it must be boring. Therefore, in mathematics teaching, it is necessary to cultivate students' interest in learning, transform the objective requirements and expectations put forward by society and schools into students' inherent learning needs, fully mobilize students' initiative and enthusiasm in learning, and change "I want to learn" into "I want to learn". Through teaching practice, the author concludes that we can focus on cultivating students' interest from the following aspects. 1. The introduction of new lessons and the wonderful and interesting introduction before class arouse students' strong desire for knowledge and interest in learning, so that students can enter the best learning state. For example, once listening to "Comparison of Scores" in a primary school math class, the teacher designed such a situation for the students: "Tang Priest and his disciples went to the West to learn from the scriptures and passed by a watermelon garden. Master sent Bajie to beg for alms. Bajie brought back a watermelon. Master ate all 25, and Pig ate all 38. Ask him who eats more watermelons? " The students immediately began to think of ways, and people who don't even think at ordinary times want to know the result. In this way, all of a sudden the whole class followed the teacher with an urgent desire for knowledge and entered the new class, which achieved twice the result with half the effort.