Mental retardation is a disorder of cognitive and psychological activity caused by organic damage to the brain during the development of the child or by incomplete development of the brain, and the level of intelligence is significantly lower than the average level of development of children of the same age. It is usually caused by genetic mutations, infections, endocrine abnormalities or traumatic injuries that cause the brain to fail to develop normally or to be underdeveloped, so that the child’s intellectual development remains at a relatively low stage. If you find that your child is mentally retarded, go to the hospital in time. Depending on the severity, mental retardation is classified as mild, moderate or severe. The causes of mental retardation vary, as do the severity of the condition, and there are a variety of treatments. In general, patients are provided with functional training, intelligence training, and abnormal behavior correction training to stimulate the brain’s own analysis, synthesis, and regulation activities through training of perceptual and muscular activities to promote the improvement of brain function and the simultaneous enhancement of physical functions. The younger the child, the better the treatment, because the child’s brain development is not mature enough at this time, and the plasticity is stronger, so the treatment is more effective. The less severe the disease, the better the treatment. The more common the disease type, the better the treatment. For hereditary mental retardation, Down syndrome, etc., the treatment effect is poor. Rehabilitation treatment programs for children with mental retardation must be scientifically effective. According to the score, targeted and systematic rehabilitation training is carried out, and appropriate training methods are selected according to the individual’s ability and comprehensive environmental conditions. The assistance of professional rehabilitators and family rehabilitation is more conducive to improving function and promoting the child’s physical and mental development.