Schizophrenia is one of the most common psychiatric disorders in adolescence. It begins in adolescence, with a peak incidence of 56% to 62% between the ages of 15 and 25. According to surveys in China and the United States, the proportion of adolescents suffering from schizophrenia ranges from 0.5% to 0.7%, and the number of men and women is close. In other words, at least one out of every two hundred high school students has symptoms of schizophrenia. There is a relationship with the onset of stress during adolescence. Of course, it is associated with genetic predisposition, viral infections and many other factors. Early detection of the disease can help in early diagnosis and treatment, improving the prognosis and early recovery. The early symptoms of the disease are not significant, the following are suspicious: a. personality changes, contrary to the past personality and temperament of the norm, or in the original lonely introverted personality based on the more abnormal loneliness, withdrawal, eccentricity, not easy to approach, reluctance to take the initiative to contact with the outside world, or even closed doors. Second, living habits abnormal, unkempt, unhygienic, lazy life. The academic performance drops significantly for no reason, the enthusiasm for learning decreases, and the attention is not concentrated, although parents and teachers point out, education and counseling, but still no improvement. 4.Symptoms similar to neurasthenia: insomnia, headache, dizziness, fuzzy mind, fatigue, etc., for no reason, after psychological treatment and general medication is not effective. V. Emotional perversion, disaffection, lack of interest, unreasonable behavior, or emotional indifference, irritability, agitation, or even inexplicable self-injury or injury. 6. Behavior that is meaningless or against common sense, such as admiring oneself in the mirror, laughing for no reason, talking to oneself, pursuing the opposite sex indiscriminately, committing shameless acts, etc. Hallucinations or delusions. The patient complains that he/she can hear human speech when there is no sound outside, can see people without external stimulation, and has abnormal skin sensations (insect crawling sensation, lower body abnormalities, etc.). Unexplained suspicion of others, feeling that people’s words and actions are directed at them, mocking or harming them. Even when walking on the road, he feels that many people are paying attention to him, or that someone is following or watching him. Or generate strange and unrealistic thoughts, self-blame and self-sin, all explanations are invalid. 8. Disconnected from the reality of random thoughts, all day long into the state of uncontrollable “thought automation”. Theoretical research without practical meaning (“pure theorizing” symptoms), purposeless study of the philosophy of life, the laws of the universe, sometimes to the extent of abandoning school, closed-door indolence. X. Sudden doubts about one’s biological parents, thinking that they are not one’s biological parents. Explanations are ineffective and the conviction is unchanging. Patients suspected of having early symptoms should be further asked to write down their thoughts and psychological experiences, and written materials such as diaries, letters, and essays written by the patient should be collected and analyzed by a specialist to facilitate a diagnostic conclusion. Of course, the diagnosis of schizophrenia is a very careful and serious matter. Patients and parents should not avoid avoiding medical treatment, but think that they have been struck by an evil spirit, and go around begging God and worshiping Buddha, thus missing the opportunity for early treatment. If a diagnosis of schizophrenia is confirmed, a psychiatrist must be responsible for systematic treatment.