Psychiatrists and psychologists have confirmed that personality is more closely related to mental illness. Everyone’s personality and temperament are different, just as everyone’s appearance and appearance are different. Therefore, personality and temperament belong to the psychological appearance of each person. They also include a person’s ability and temperament (which refers to the characteristics of mental activity that a person is born with). The onset of schizophrenia has a lot to do with personality and temperament. Studies have shown that most people with schizophrenia are withdrawn, introverted, timid and fearful of things, suspicious and sensitive, and fantastical, among others. Some studies have found that 50-60% of schizophrenia patients have these personality traits before the illness. Therefore, some people refer to this personality trait of being withdrawn, introverted, shy, sensitive, socially awkward, illogical, fantasizing, and thinking about things as a “split personality”. This characteristic personality trait constitutes a “hotbed” for the development of schizophrenia. However, there are many people with schizotypal personalities who do not develop schizophrenia. This suggests that there is a relationship between schizotypal personality and the onset of schizophrenia, but it is a condition rather than a determinant of the onset. In a sense, the development of a lively and cheerful personality in children from an early age has a role in preventing the onset of schizophrenia.