Second, the main task of teachers is to impart scientific and cultural knowledge to students and promote the all-round development of students' personality. Therefore, teachers must be proficient in the internal relationship between the basic knowledge of the subject and the knowledge of each part, and understand the development trend and the latest research results of the subject. Only when teachers master knowledge deeply can students understand doubts in simple terms. Facing the acceleration of knowledge updating, only when teachers win students with profound knowledge will teachers have admiration for them, and students will have communication psychology, be willing to communicate with teachers, reach a consensus, and have thirst psychology, thus improving the educational effect. Teachers should also keep pace with the times, speak fluent and standard Mandarin, and have various knowledge and abilities such as English and computer use.