Clinical work often encountered this problem: the baby’s movement, imitation, speech, recognition of objects and other abilities than the same age of the child’s development is slow, such as: head up late, sit late, walk late, talk late, poor hand skills, and so on. A lot of parents, especially the elderly always think it does not matter, grow up on the good, and some parents avoid medical treatment, do not recognize the reality, and wait until the child grows up a little bit, the problem is becoming more and more obvious when you go to the doctor even missed the best time for treatment, resulting in lifelong regrets. How to avoid such problems? First of all, to understand the normal children at different ages should achieve what level of ability, may often be compared with the surrounding children, if there is backward, hurry to find a doctor to check, especially pay attention to the neurological examination Secondly, to understand the common causes of developmental backwardness, including: 1, excessive bed rest, lack of environmental stimulation caused by transient developmental backwardness (deprivation syndrome); 2, improper feeding Nutrient deficiencies; 3. Congenital hypotonia; 4. Simple increased muscle tone or transient acromegaly at specific developmental ages; 5. Neurological disorders including: cerebral palsy, mental retardation, autism, speech disorders, inborn metabolic disorders, muscular disorders, hereditary disorders, and degenerative disorders, and so on. Thirdly, regular follow-up and developmental monitoring of high-risk children should be emphasized. For children whose mothers have illnesses during pregnancy, fetal hypoxia, obstructed labor, preterm delivery, twin or multiple births, diseases in the neonatal period, and family history of brain injury, it is best to examine them once a month within half a year, and then once every 2 months after half a year until after they walk normally or can talk. The examination results have abnormalities should be good systematic intervention treatment, under the guidance of the doctor’s growth. Fourth, the mild backwardness of the child should not be taken lightly, although no treatment can walk and talk, but in the future there may be inattention, poor motor coordination, hyperactivity, tics, learning difficulties, and even intellectual level deviation from normal. Some children with mild mental retardation clinically show that motor milestones are slightly behind their peers, usually only at about 1.5 years of age can they walk alone and speak on their own initiative (normal children usually walk and talk at about 1 year of age), their speech development is slow, they usually can’t sit still, they aren’t interested in reading books or telling stories, they are capricious, tantrums, and don’t listen to discipline, but they can eat and play. If these children can be detected and treated early before the age of 1-2, they can avoid many problems and benefit for a lifetime. Fifth, for the expression of indifference or single, less eye to eye, play with their own happy, can not pronounce the “conversation”, to the call of the name of the baby turned a deaf ear (1 year old children), should pay attention to the tendency of autism, should be detected as early as possible, early intervention, do not wait until the appearance of autism triad (most of them are after the age of 3 years old) intervention, the efficacy of the treatment will be greatly reduced. The efficacy of the intervention will be greatly reduced.