Abstract: According to the concept of cognitive psychology,the students ＇ knowledge of combination of mathematics and physics is represented through constructing the cognitive structure of the combination of mathematics and physics in the brain. In the reform of mathematics and physics teaching,we firstly use the method of concept assi-milation to help students to understand and master the concepts and laws of physics,then build the optimal cognitive structure of the combination of mathematics and physics. Finally,through practice,we cultivate students＇ abilities to use the skills of mathematics to solve physical problems. Through more than 10 years constant teaching practice,we have found a better solution to the problem of mathematics and physics combination and achieved combining teaching with general physics and theoretical physics.

Key words: cognitive structure, physics teaching, combination of mathematics and physics