There are many criteria for whether a person is mentally healthy, but there is no unified measurement standard. According to the characteristics of mental activities of our adolescent children, they should have the following psychological qualities to reach mental health. 1, normal intellectual development Intelligence is a comprehensive reflection of an individual’s ability to observe, comprehend, imagine, think, reason and other mental abilities. Intelligence increases with age. The normal development of intelligence means that the individual’s level of intellectual development is commensurate with his actual age, which is one of the important signs of mental health. 2.Stable Emotions Mentally healthy adolescents are dominant in positive emotional experiences such as optimism and satisfaction. Although negative emotions such as sadness, confusion, failure and frustration may also appear, they will not last long and they can properly express and control their emotions to keep them relatively stable. 3, can correctly understand themselves Mentally healthy adolescents have self-respect, self-love and self-respect, they can objectively evaluate others, but more importantly, they can correctly understand themselves, evaluate themselves and grasp themselves. 4.Have good interpersonal relationships Mentally healthy children and adolescents have positive and good interpersonal relationships. Respect for others, understanding of others, good at learning the strengths of others to make up for their weaknesses, and can get along with others in a friendly, tolerant manner. 5.Stable and coordinated personality Personality, also known as personality, is a unique psychological characteristic or unique behavior pattern of each person, which is formed gradually on the basis of innate qualities and under the long-term influence of the environment. Mentally healthy people have a relatively stable and coherent personality system. The basic characteristics of a healthy personality are: a relatively stable emotional state, perseverance, flexible resilience, a strong sense of responsibility and good self-control. 6, love life Mentally healthy people love life, can deeply feel the beauty of life and the joy of life, and actively look forward to a better future. Can give full play to their potential in all aspects of life, and do not lose confidence in life because of setbacks and failures. Can correctly deal with the reality of difficulties and adjust their thinking and behavior strategies in time to adapt to different social environments. 7, mental activities and mental development age characteristics of a certain age should be corresponding characteristics of mental activities, such as children and adolescents should be vigorous, while the elderly should be stable, sophisticated. Psychologically healthy people’s mental activities should be compatible with the age characteristics of psychological development.