Crawling is a representative movement other than walking, and is a representative means of movement for quadrupeds in the evolution of human beings. Typical crawling movement is two hands, two knees on the bed, two shoulders and pelvis raised, maintaining the space of the trunk horizontal position of the four crawling posture, that is, in the four-point support state, at least one limb away from the support surface, four limbs alternating movement to drive the body forward. Crawling is very important in the development of infants and young children’s movements, crawling can not only promote the coordinated development of the whole body movements, laying the foundation for upright walking, but also increase the search for space, active acceptance and recognition of things, and promote the development of infants and young children’s cognitive ability. The purpose of crawling training is to promote the coordination of interactive movements of the lower limbs and to lay the foundation for independent walking. It promotes the forward shift of the child’s center of gravity, the emergence of separate movements of both lower limbs, and improves the weight-bearing capacity of both lower limbs. The significance of crawling training, crawling movement is the basis of upright movement. The two conditions for independent walking are the completion of the four crawling movements and the completion of dynamic balance in the standing position. The completion of the crawling movement marks the completion of the trunk gyration movement, the improvement of the motor separation ability of the pelvis, and the acquisition of the anti-gravity ability of lifting the pelvis off the bed. Facilitation of the lateral shift of the center of gravity and the interactive movement of both lower limbs. The age of development of crawling is 9 months will crawl, infants crawl motor development a total of nine, hip higher than the head; lower limbs flexed in place, hip head the same height; two hands support, chest away from the bed; forward movement of the upper part of the body, back crawl; forward movement of the lower part of the body, belly crawl; two hands and two knees support, four crawl shaking; four crawl interactivity poor; standardized four crawl, one side of the upper limbs and the opposite side of the lower limbs on the diagonal interactive stretching crawl; flexible forward movement, available on two hands, two knees, two hands and one knee, two hands and two feet, etc. crawl at will, will not crawl the development of more than stay in 4 items before. The conditions for crawling are the completion of two-handed support (two elbow support and head lift is the prerequisite for two-handed support); the realization of four-crawl position; the further refinement of uprightness and balance response (vagal uprightness, visual uprightness, trunk uprightness is the prerequisite for four-crawl position); the ability to change posture from prone crawl position to four-crawl position and then to prone crawl position; the completion of the interactive movement pattern of the four limbs; and the completion of single elbow support in the lateral recumbent position.