Childhood autism is a disorder that occurs in early childhood with pervasive developmental disorders. Its main symptoms include isolation of interpersonal relationships, language difficulties, and behavioral disturbances with impaired recognition of social interactions and communication. Its main clinical manifestations include social difficulties, language interaction disorders, abnormally narrow interests, obsessions with sameness, and mostly ritualistic and compulsive behaviors. 1. Social interaction disorder: Lack of facial expressions and eye contact can be demonstrated in infancy. When parents leave, there is no reaction or no expectant posture when they come back, etc.; indifferent attitude toward people, ignoring others’ calls, actively breaking away when others touch him, and not asking for help when afraid. 2. Language development disorders: silent, speaks later than others, cannot take the initiative to talk with them, language lacks tone, and does not use gestures, nodding, shaking head, or facial expressions to express their needs. 3. Narrow range of interests and stereotypical behavior: will insist on doing something in the same way every time. Ask for one type of toy, and ask for the same meal content and location every day. If this rule is broken, it will scream or refuse to perform. Will have some odd behavior, constantly flapping, spinning walk, etc.