The treatment of mental retardation is mainly to understand the cause of the disease, solve the original disease and treat the symptoms. Specific treatments are as follows: first, group language training, which can provide children with opportunities to understand, learn and cooperate with each other, and can enable children to imitate each other, modify and strengthen their behaviors, and build up their language ability and social interaction ability; second, occupational therapy plus cognitive function training, which can improve the fine coordinated movements of the upper limbs and hands, and improve their daily life ability; third, sensory integration training and Third, sensory integration training and multi-sensory stimulation can enhance the ability to focus attention, organizational ability, self-control, learning ability, generalization and reasoning ability, and enhance their self-confidence; fourth, guided education, applying colorful contents and means, encouraging children to participate and stimulating the passion of children to participate actively, so as to promote the improvement of their cognitive, motor, intellectual, verbal, and learning functions, and to promote the physical and mental health of children Fifthly, auditory integration training can improve children’s intellectual level, make them concentrate, relax and stabilize their mood; sixthly, dysarthria treatment can improve the movement and control of children’s mouth, tongue, lips and jaw, solve the problems of salivation, swallowing and chewing difficulties, and improve the clarity and articulation of speech; seventhly, oral muscle training technology can normalize the sensitivity of oral touch by increasing the cognition of oral muscles and normalizing the sensitivity of oral touch, so as to promote the physical and mental health of the children. tactile sensitivity normalization, improving autonomic control of oral structures during speech, increasing separation activity of oral muscles, and improving articulation to achieve an optimal level of clarity; and eighth, acupuncture therapy, which stimulates cognitive and language functional areas to improve cognition and language.