Early symptoms of autism in two year olds mainly consist of social impairment, communication disorders, limitations and stereotyped behaviors. 1. Social disorder: two-year-old children with autism can show social disorder, children have no interest in socializing with others, often avoid the eyes of others, lack of response to calls, and not easy to establish friendships. 2. Communication disorders: Children have fewer gestures and facial expressions for communication, and their language development lags behind that of their peers. 3. Limitations and stereotyped behaviors: two-year-old children with autism may show repetition of an action, stereotyped behaviors to cope with ordinary life. Stereotyped repetitive language, for language structure, personal pronouns will often use the wrong, and accent, rhythm, speed of speech, intonation will have some problems. There are many early symptoms of autism in two-year-olds, and it is important to visit a hospital in time after the appearance of the above suspected symptoms to intervene and treat them to avoid adverse consequences.