The development of infant movement is an important marker of neurological development. The developmental process of infants from congenital unconditioned reflexes to the formation of complex motor skills follows certain principles. The development of human movement is closely related to the development of psychology and intelligence; psychological development is inseparable from movement and activity, and movement development is the basis for other aspects. The initial action response of infants and toddlers to the outside world is an undifferentiated set of responses, a whole-body activity. For example, 1-2 months old infants and toddlers, when adults approach him and tease him will cause his whole body movement, hands and feet keep waving. As the nervous system and muscles mature, there will be localized and precise movements. For example, infants and toddlers start to learn to grasp things from 4-5 months old. At the beginning, the hands and eyes are not coordinated and the whole body exerts force, so the hands cannot grasp the object, but gradually they can touch it, and then the hands and eyes can develop to coordinate and accurately grasp what they want. 1, 1 month. Little arms and legs always like to be in a flexed state, and both little hands are clenched in fists. The head can be raised for a moment when lying down. 2.2 months. The baby’s hands are gradually loosened from the fist-clenched position. If he is given a small toy, he can grasp it unconsciously for a moment. He will make sucking movements immediately when he is offered to feed. He can kick with his little feet. 3. 3 months. He can lift his head and chest when lying on his back, and his neck no longer sways when he is held vertically. He can lift his limbs up when lying on his back, and will try to roll over with the help of adults. The hands can hold in front of the chest and pay attention to their own hands. 4. 4 months. Babies can lift their heads and chests. from about month 4, the muscles of the neck and head begin to become strong, and babies always love to lift their heads when lying on their backs and hold this position. the most classic position for a 4-month-old baby is to be able to lift his head to 90 degrees, support his upper body on his elbows, lift his chest off the floor, and then search for things of interest nearby with his eyes. a 4-month-old baby will try to sit up propped up, and if the 4-month-old is allowed to If a 4-month-old is allowed to sit on the floor, he will temporarily support himself with both hands before falling forward or to one side. 5 and 5 months. Can roll over from supine to prone position. Can sit with his back against the cushion for a while, and can sit with a straight back. Can hold a toy in each hand. 6.6 months. Can roll over and can sit on his own for a while. Can stand up straight if held, and will keep jumping when standing on an adult’s lap. Hands can play with feet and can eat toes. Can hold a toy in each hand steadily. 7, 7 months. Can sit alone for a few minutes, can change from a lying position to a sitting position, and begin to learn to crawl. 8, 8 months. The ability to crawl is getting better and better, and he/she can turn the direction when crawling. 9, 9 months. Can stand with support and can sit from a standing position. Can crawl forward and backward flexibly. Can hold a cup to drink water and can take food with his own hands to eat. 10.10 months. Can stand alone for a while, and can take steps when held by an adult, and can crawl quickly. Enjoys pushing chairs and strollers, and can push them around. Sitting, lying, crawling and standing movements change freely. 11, 11 months. Can take a few steps independently, and adults can hold them. Can turn their bodies freely to the left and right when sitting. Can pick up small objects such as buttons and peanuts with their hands. Body balance and coordination of body and limbs have developed greatly. Can grasp food with their hands. Enjoys pouring toys in and out of the basket. Can open and close books. 12, 12 months. Can stand on their own and walk further and further alone, interested in new forms of movement. Begins to scribble with a pencil. Learns to control toys with hands.