Dissociative identity disorder, also known as polyphasic personality disorder, is a condition in which two or more identities or personalities control the individual’s behavior and is accompanied by episodes of amnesia. It is also called dissociative personality disorder in some publications. It is a type of psychological disorder that is classified in the Diagnostic and Statistical Manual of Mental Disorders (DSM) as an Axis I dissociative disorder. Dissociative identity disorder is a type of disorder that is prone to relapse. Timely elimination of the causes of the disorder, enabling patients to have a correct understanding of the nature of their disorder, confronting their existing character defects, and improving interpersonal relationships are helpful in preventing relapse. If the patient is hospitalized for a long time or recuperates at home, family members often give accommodations or inappropriate reinforcement to the patient’s non-adaptive behaviors, which are not conducive to the patient’s recovery. To improve and develop a healthy personality suitable for oneself. To a certain extent, a healthy personality is the result of personal choice. The criteria we use to determine a healthy personality and the extent to which we can achieve a healthy personality depend on personal choice. Society, school, and family should guide adolescents to refer to the healthy personality model to actively and independently choose to establish a personality model suitable for themselves (group or individual), and sublimate their ideal healthy personality through a combination of self-shaping and social training.