Compared with ordinary middle schools, the quality of vocational school students is uneven. Students will have different psychological obstacles when facing specific mathematics learning. For example, cognitive impairment: do not understand the purpose of learning mathematics, lack of interest in learning; Will obstacle: fear of encountering difficulties in front of the course and content, resulting in timid mentality and being at a loss; Frustration obstacles: problems encountered in learning can't be solved, or exams are repeatedly defeated, and you doubt your IQ and ability; Thinking obstacle: confusion of concepts and thinking in the learning process, resulting in loss of self-confidence, etc ... all these have put forward a severe test for every math teacher in our vocational school. In the face of these students who have weak foundation, have not developed study habits and have been hit by the senior high school entrance examination, how should we carry out mathematics teaching? I think we should start from the following aspects: 1, the first math class in a good vocational secondary school, attracting students, which is one of the initial goals of all teaching. But it is not easy to achieve this goal, especially in secondary schools. Modern psychology implies that different psychological states will produce different learning effects. All kinds of non-intellectual emotional psychological factors weaken the motivation of mathematics learning as a whole, resulting in the ability difference between students. Therefore, we should attach great importance to the role of emotional factors.