In a broad sense, mental health refers to an efficient, satisfactory and continuous mental state; In a narrow sense, mental health means that people's basic psychological activities are complete and coordinated, that is, knowledge, emotion, will, behavior and personality are completely coordinated and can adapt to society. The basic standards of college students' mental health can be summarized as the following eight aspects: normal intelligence; Accept others and adapt to the environment; Know yourself and accept yourself; Have a sound personality; Psychological behavior conforms to the age characteristics of college students; Have a harmonious interpersonal relationship; Behavior is consistent with social role; Have strong emotional adjustment ability. To correctly grasp the mental health standards of college students, we should pay attention to the overall coordination, relativity and development of the standards. The main ways to improve the mental health level of college students are to improve the three-level mental health education network, carry out various forms of mental health education activities, attach importance to the construction of campus culture and create a good psychological and social environment. People's mental health level can be roughly divided into the following three levels. 1. General normal psychology. 2. Mild psychological disorder. 3. Serious morbid psychology.