The development of modern civilization has made human beings more and more detached from their natural attributes. Pollution, fast-paced life, increased pressure of study and employment, unprecedented amount of information, complex social relationships, changes in family structure, changes in work and rest patterns, differences in consumer orientation, and spoiling have gradually increased and worsened psychological disorders. In modern society, children’s psychological disorders are getting more and more attention. However, many young parents, faced with abnormal behavior in their children, are often puzzled and wonder whether they should consult a psychologist. Mental illness is a phenomenon that occurs when a person deviates from the normative trajectory of social life mentally, emotionally and behaviorally due to mental tension and disturbance. The greater the degree of mental and behavioral deviation from the norms of social life, the more serious the mental illness will be, and mental illness is a serious mental illness. There are many types of psychological disorders with different manifestations. Common psychological disorders in children include hair pulling fetish, hyperactivity, habitual diaphoresis, nocturnal enuresis, autism, mental retardation, stuttering, verbal skills developmental disorder, learning skills developmental disorder, cyber syndrome, childhood tic disorder, childhood withdrawal behavior, conduct disorder, selective muteness in children, paranoia, nail biting, xenophilia, childhood transvestism, childhood schizophrenia , childhood phobias, childhood anxiety disorders, depression, etc. It is important to note that these childhood psychological disorders may also persist into adolescence or even adulthood because of untreated or untreated conditions. However, they can be prevented and treated if we pay attention to them, treat them correctly, and intervene early. Clinical practice proves that in the development of certain psychological disorders, the body’s response is not only related to the intensity and duration of the triggering factors and the functional state of the body, but also closely related to the patient’s pre-morbid personality characteristics. Therefore, strengthening the personality exercise and cultivating its ability to be patient, restrained and cultured can eliminate excessive excitability, promote the balance of its excitation and inhibition, and prevent the dysregulation of higher neural activity caused by the rapid changes of the external environment. Also pay attention to the functional state of the nervous system, such as excessive fatigue, long-term insomnia or somatic rest, easy to promote the occurrence of some psychogenic psychosis, therefore, to maintain adequate sleep, work and rest, strengthen physical exercise to enhance physical fitness, to prevent the occurrence of psychogenic diseases has a positive significance. Individual character formation in the formation of the acquired environment of the adverse factors, in the development of childhood personality disorders and behavior disorders, occupies a fairly important position. The most common adverse factors are childhood trauma, incorrect educational methods, disharmonious family life and the influence of the surrounding environment. The main measures for prevention are: 1, pay attention to mental health education from childhood, children’s early personality development determines their later personality characteristics, childhood is an important period to build the foundation for physical and mental health. 2. Pay attention to the issue of home and school education. Children are rich in imitation, easy to be influenced by the words and actions of those around them, the family and school cooperation, moral quality education for children, to develop their love of work, love of collective moral and style, to develop honest, frank, strong, brave mood and cheerful and open-minded character. 3, early detection and timely correction of some mental disorders. Neurological disorders in childhood usually start with individual symptoms, such as stuttering, enuresis, twitching, and sleep disorders. Behavioral disorders in childhood are manifested as withdrawn, retarded, impulsive behavior, hyperactivity, and Internet addiction. Early detection, timely diagnosis, and timely management. The treatment of psychological problems and mental illnesses in children is mainly divided into counseling, psychotherapy, medication, rehabilitation training, and educational behavioral therapy. However, many parents are resistant to treating their children with medication for psychological disorders, fearing that the side effects of medication may affect their children’s growth and development. In fact, for children with milder conditions, psychological counseling, psychotherapy and rehabilitation are generally used to help children open their hearts through conversation and communication. If the child is more seriously ill, with hunger strikes, rapid weight loss, severe sleep disturbances, mood disorders or obvious destructive behavior, he or she should be sent to the hospital promptly and treated with medication if necessary. Every drug has its certain side effects. However, since the 1990s, there has been a great development in psychiatric drugs. Many new medications are more effective, have fewer side effects, and are safer to use. When treating children with medications, we generally start with a small dose and slowly increase the amount of medication, trying to control the disease with the “minimum effective dose”. Due to various factors in today’s society, children’s mental illness is a problem that cannot be ignored. Parents and teachers should pay more attention to their children’s language, behavior and psychology to see if there are sudden and obvious abnormalities, and to communicate more with their children if they find sudden changes in their personality, abnormal language and behavior, and to take them to a regular psychiatric hospital for psychological counseling and treatment if the situation is not alleviated.