Hidden curriculum, also known as potential curriculum and hidden curriculum, refers to the curriculum presented in an indirect and hidden way in the school scene. The main manifestations of hidden curriculum are: (1) conceptual hidden curriculum. Including the ideology hidden in the explicit curriculum, the school spirit and style of study, the educational thoughts, values, knowledge, teaching style and teaching guiding ideology of leaders and teachers. (2) Material hidden curriculum. Including school buildings, classroom layout, campus environment and so on. (3) Institutional hidden curriculum. Including school management system, school organization, class management mode and class operation mode. (4) Psychological hidden courses. It mainly includes interpersonal relationships in the school, the unique mentality and behavior of teachers and students.