Indirect moral education is an educational activity that subtly guides students to form and master moral knowledge and concepts through moral infiltration in the teaching or educational practice of other disciplines. Indirect moral education includes teaching, guidance, management, activities and environment. Indirect moral education refers to the teaching of all subjects except ideological and moral courses and current affairs and politics courses: the work of the head teacher: the work of the Young Pioneers, the Communist Youth League and the Student Union; Labor and social practice: activity courses and extracurricular activities: off-campus education: psychological counseling and vocational guidance: campus environment construction: family education and social education. The hidden curriculum is presented in a hidden and indirect way, which is not reflected in the curriculum planning and is not carried out through formal teaching. They are usually reflected in the situations of schools and classes, including material situations, cultural situations and interpersonal situations, which have a subtle influence on students' knowledge, norms, values, attitudes or behavior habits, and promote or interfere with the realization of educational goals. It has the characteristics of potential, unpredictability, dispersion and universality. Therefore, indirect moral education is not a hidden course.