Several different types can be classified according to the cluster of clinical symptoms. The classification of types is also related to the onset, course, treatment response and prognosis. The common types are: (1) Paranoid type: also known as delusional type, mostly in young adults or middle-aged people, with a slow onset. The main manifestation is suspicion and various delusions, the content is mostly detached from reality, and the structure is often fragmented and tends to generalize. It may be accompanied by hallucinations and perceptual syndrome. Emotions and behaviors are often dictated by hallucinations or delusions, and self-injurious or injurious behaviors may occur. The course of the disease is slower than other types, and the phenomenon of mental decline is less pronounced, with few spontaneous remissions and better treatment results. This type is the most common, accounting for more than half of the cases. (2) Youthful type: also known as disintegrative type, mostly develops in adolescence, with an acute onset and rapid progression, mostly peaking within 2 weeks. The main symptoms include ruptured thinking, absurd and bizarre thinking, uncoordinated emotional reactions, childish and stupid behavior, and hyperactive instinctive intentions. Hallucinations and delusions are messy. This type of patient has a better outcome if treated promptly. This type is more common. (3) Tension type: It mostly occurs in young and middle-aged people, with a more acute onset. Clinical manifestations are mostly seen in a state of rigidity, which can be slow movement, little speech and little movement in mild cases, or no speech, no movement, no food, no response to environmental changes, and defiance and waxing flexion in severe cases. Tension agitation may alternate with transient tension arousal, when the patient appears to have sudden impulses, hurting and destroying things. The catatonic type is better treated than the other types. Currently there is a trend of clinical decrease. (4) Simplex type: The onset of the disease is in adolescence, with a slow onset and continuous development. In the early stage, the symptoms are similar to “neurasthenia”, such as subjective fatigue, insomnia, decreased work efficiency, etc. Gradually, there is increasing withdrawal, emotional indifference, laziness, loss of interest, poor social activities, and purposeless life. In the early stages of the disease, it is often not taken seriously, or even mistakenly thought that the patient is “not motivated” or “not cheerful enough”, etc., and is often seen only after many years of the disease. These patients usually do not have hallucinations and delusions, so they are easily ignored or misdiagnosed, and the treatment effect is poor. (5) Other types: In addition to the above four types, if the symptoms of each type exist at the same time and are difficult to be typed, it is called untyped, which means that the clinical manifestations of the patients have the characteristics of more than one subtype at the same time, but there is no obvious grouping characteristics. There are also some patients whose clinical manifestations met the diagnostic criteria for schizophrenia in the past and have not been in complete remission for at least 2 years. The current condition has improved, but residual individual positive symptoms or individual negative symptoms remain, which is called the residual type. Some patients meet the diagnostic criteria for schizophrenia and have been ill for more than 3 years, but the last 1 year has been dominated by negative symptoms, and their social function has been severely impaired and they have become mentally disabled, which is called the declining type. There are also some patients whose condition is basically stable and then appear in a depressive state, called post-schizophrenic depression, and because of the risk of suicide, families should pay sufficient attention to it.