There is no clinical concept of the seventeen symptoms of mild autism. Autism is also clinically known as autism, or pervasive developmental disorder, which usually develops in infancy and early childhood, and the main symptoms are varying degrees of social interaction disorder, language development disorder, narrow interests and stereotyped behavior: 1. They usually do not use their eyes, facial expressions, body posture, etc. to communicate with others. Always alone, not responding to the call of others, indifferent to the surrounding things, unable to feel the joy of the group. Patients also refuse to be cared for by others, so they are unable to establish attachment relationships. When they encounter unpleasant things or suffer injuries, they do not seek comfort from others and have no sense of danger. Usually, the patient does not initiate conversation with others and does not ask questions, and speaks as if he or she is talking to himself or herself, often imitating language and repeating language in a stereotypical manner, and speaking in a strange tone and intonation. 3. Patients often obstinately maintain the flow of daily activities, including walking routes, eating order, etc., play in a strange way, and also excessively attached to certain smells or objects and get satisfaction from them, if destroyed will appear unhappy, crying, or even defiant. Some patients may show repetitive stereotypical hand clapping and foot stamping. At the same time, patients will refuse to accept new environments and react strongly to unfamiliar environments. In addition to these typical symptoms, some patients may also have emotional instability and self-injury, and a small number of patients may also suffer from epilepsy and Tourette’s syndrome.