Autism is a pervasive mental developmental deviation, and unlike mental retardation, it is both a deviation and feels a bit odd. What is odd about it? To summarize, there are three aspects: First, social interaction disorder, where the child is not interested in interacting with others. The child lacks a normal reaction to his parents leaving or going home, and seems indifferent or even indifferent. They do not play with children in kindergarten and rarely make eye contact with others; their expressions appear cold or withdrawn; and they often do not listen to the calls of others. The child is silent or seldom uses language, and often cannot distinguish the meaning of the pronouns “you, me, and him”. Some children, although they can talk, never initiate and participate in conversations, and sometimes scream or repeat language in a stereotypical manner. Some children have unusual interests and play styles, such as an obsession with certain objects (old dolls) and an interest in the non-dominant characteristics of objects (not allowed to change to new dolls). The child’s environment is fixed (eating the same food, walking the same route, placing objects in a fixed position), stereotypical repetitive behaviors or specific postures (spinning, spinning, walking on tiptoe, walking backwards, gazing with hands on the chest, peculiar hand movements, banging, swaying, and self-injury). In addition, some children are hypersensitive or sluggish, with weak limbs and clumsy movements. About three-quarters of the children have intellectual deficits. Some children once had special abilities such as extraordinary memory, calculation, date projection, and powerful literacy, which should not be mistaken for prodigies or special abilities. Autistic children are 4-5 times more likely to be male than female, and the cause of the disease is so far unknown. There are no specific medications available, but the main treatment is training, and parents should accompany the child to train together. Parents of children with autism need to become experts in autism, fully understanding their child’s deficits and knowing how to train and adjust. Proper training can improve the condition and enhance self-care and social adjustment.