Mathematical reasoning is a competition to train students to be good at thinking and pursuing truth, and to improve their mathematics learning quality. Children who dare and are willing to express their understanding of mathematics not only "understand and understand" the essence of mathematical knowledge, but also "write clearly and clearly" the truth. According to the requirements of the new curriculum and the direction of the Ministry of Education to cultivate students' ability, it is more important to enhance the atmosphere of humanistic literacy, promote the deepening and development of literacy education in primary schools in youth education, and improve students' ability to clarify problem-solving ideas, master problem-solving skills and clarify mathematical problem-solving steps from the perspective of mathematics.