Dissociative Identity Disorder was previously known as MultiplePersonalityDisorder (MPD), and is also referred to as Dissociative Personality Disorder in some publications. It is a type of mental illness that is categorized in the Diagnostic and Statistical Manual of Mental Disorders (DSM) as an Axis I dissociative disorder. Nursing to strengthen psychological guidance, the use of supportive psychotherapeutic methods, mobilize the enthusiasm of patients, stimulate their enthusiasm for life, and strengthen the confidence of patients to overcome the disease. Give more care, sympathy, comfort, give patients the necessary help in life, do more detailed ideological enlightenment, supplemented by warm care. At any time to ease the patient, eliminate bad emotions. Giving patients psychological education on diseases, eliminating the causes of diseases in time, improving patients’ interpersonal relationships and changing certain unfavorable personality traits can help prevent disease recurrence. To improve and perfect their own healthy personality. Healthy personality is, to a certain extent, the result of personal choice. What kind of standard we use to determine healthy personality and to what extent we can achieve healthy personality depends on personal choice. Society, school, family should be aimed at the different characteristics of youth groups and individuals and the actual situation, guiding young people with reference to the healthy personality model proactively, independently and autonomously choose to adapt to establish their own (group or individual) personality model, and through the combination of self-modeling and social cultivation to sublimate the ideal healthy personality of adolescents.