The child will crawl around 8 months, but each child has its own growth and development rules, the early and late development and the following factors: 1, parents are overly worried, protection, did not create good exercise, play opportunities for children, no good exercise environment. 2, excessive requirements, the child just have a sense of climbing, parents set up heavy obstacles, resulting in the child can not complete, and thus give up. 3, motor Delayed development, individual children due to congenital or acquired factors, resulting in delayed motor development of the child, not only the performance of late crawling, other aspects will also be corresponding performance. 4, malnutrition, due to the child’s nutritional intake is insufficient, resulting in malnutrition, which affects the child’s development of various sports as well as intelligence. The solution is to alternately push the child’s legs, so that the child to adapt to the action of crawling, but when the child first learned to crawl, generally backward first, gradually before the forward crawl, you can also put a child’s favorite items in front of the child to guide the child to crawl forward.