A seven or eight year old child with moderate mental retardation may be able to take care of himself with active treatment, but without active rehabilitation, his condition will recover poorly. According to the cause of mental retardation to carry out targeted rehabilitation exercise, can be in the sensitive period of the disease in time with the nutrition of brain cells of the drug treatment. The cause of mental retardation in babies should be identified. If it is caused by abnormal growth and development, it can be recovered slowly through rehabilitation training. However, if it is caused by genetic and chromosomal abnormalities, the mental retardation will gradually worsen in the process of growth and may eventually lead to inability to take care of oneself. For children with mental retardation, rehabilitation training should be actively carried out in normal times, so that they can take care of themselves as far as possible.