As the name implies, a school for the mentally retarded is a place for children and adolescents with mental retardation (referred to as mental retardation) to study, and it is an institution that implements special education for children and adolescents with mental retardation. Teaching and training should be carried out according to the characteristics of children with intellectual disabilities in order to compensate their intellectual and adaptive behavior defects and cultivate them into self-reliant workers who can adapt to social life. In addition to teaching students according to their characteristics, the school also provides some "protection", which can make these disabled children produce a conditional self-protection even if they don't understand the reasons, and help them grow up healthier and safer in their later lives.