Internet addiction, also known as gaming disorder, is defined as a disease because it may lead to serious deterioration of physical and mental health, although not like alcoholism that makes physical quality deteriorate rapidly, but will subconsciously affect physical and mental health, the harm is as follows: 1, role confusion: adolescent network addicts are overly addicted to virtual roles in the network, easily lose their true selves, bring the rules on the network to real life, resulting in role confusion. When adolescents are frustrated with people in the real society, they turn to virtual network devices to seek comfort and negatively escape from reality, which is extremely detrimental to adolescents’ self-personality shaping; 2. Weakened moral sense: In cyberspace, adolescent network addicts are not dealing with their people face to face, and lack of interpersonal relationship supervision with teachers and parents as the core in the real society, so they are free to be capricious online and lack prudence and moral self-discipline. Moral self-discipline, easy to indulge their desires in online games, resulting in online violations and illegal behavior; 3. Personality alienation: adolescents are addicted to the Internet for a long time, easy to lack interest in people and things in real life, emotional indifference, reduced interaction with relatives and friends, and closed themselves off, which is not conducive to the establishment of a healthy outlook on life and values. And a large amount of information flooded online, adolescents in the online unrestrained behavior habits, easily lead to a decline in self-restraint, resulting in impulsiveness, conflict, patients with more serious personal symptoms, will appear violent aggression; 4, learning frustration: leading to a decline in grades, failed exams, and eventually drop out of school, mostly due to obsession with the Internet and unmotivated learning, poor academics, forming a vicious circle; 5, health damage: the regularity of daily life Completely broken, symptoms can develop into loss of appetite, weight loss, reduced sleep, dizziness, depression, difficulty concentrating, etc. Serious cases can develop neurological disorders, decreased immunity, increasing physical weakness, easy to cause cardiovascular disease or even sudden death, can be combined with emotional disorders, depression, anxiety or typical mental disorders, and even schizophrenia.