Car child safety seat, also known as child restraint system CRS, is a specially designed for children of different ages installed in the car can effectively improve the safety of children in the car seat; In ECE R44/03, a child safety seat is defined as a child safety protection system that can be fixed to a motor vehicle and consists of a seat belt assembly with a buckle or a flexible part adjusting mechanism attachment. Can be combined with additional devices such as portable crib basket auxiliary seat or collision protection, in the case of a crash or sudden deceleration of the car, slow down the impact on children and limit the body movement of children to reduce their injuries, to ensure the safety of children in the car; Existing child safety seats are mostly set separately, such seats are not convenient for installation; Therefore, we propose an All-in-One Infant car seat; The existing integrated child safety seat structure is complex, the overall stability is poor, can not bett