Children with autism disorder, Asperger's disorder, or pervasive developmental disorder, in addition to deficits in social abilities and repetitive stereotyped behaviors, also have delays in motor abilities. Delays in movement abilities in autistic children are diverse and include delays in sitting, crawling, walking, and abnormal stepping, poor postural control, and inability to plan movements. Also, social confrontation, defects in using non-verbal behaviors and lack of communication are proportional to the hip. Autism is considered a spectrum because its manifestations are very diverse and heterogeneous. For example, cognitive and verbal disabilities are very severe in some of these patients, while others have mental genius and very high talent. The main purpose of this research is to investigate and understand the biological and psychological scientific opinions of children with autism disorder. According to the scientific basis, we can conclude that autism spectrum disorder is a debilitating disease that disrupts social interactions, verbal and non-verbal communication skills, learning ability, and some vital emotions. The prevalence of this disease is increasing all over the world, including Iran.