What children really need in mathematics education is to develop the potential of the left brain and transform it into the cultivation of rigorous reasoning ability, abstract generalization ability, meticulous thinking ability and practical ability to solve problems. Children's mathematics education not only teaches all kinds of knowledge, but also teaches children to understand and think deeply about problem situations, analyze and solve problems, and cultivate children's rational thinking character and critical thinking ability. Ignoring or divorced from this ultimate goal, we can only create a problem-solving machine with weak thinking flexibility and no innovative ability to draw inferences from others.