Abstract: A child safety seat, including a headrest frame assembly and a seat frame assembly The seat frame assembly is matedly connected with the headrest frame assembly. The headrest frame assembly includes a headrest frame, an inner wall of the headrest frame is provided with a headrest polyurethane soft foam, the headrest polyurethane soft foam extends toward an outer wall of both sides of the headrest frame to form an everted rim, and the outer wall of the said headrest frame is provided with a headrest shell. The seat frame assembly includes a seat frame, an inner wall of the seat frame is provided with a seat polyurethane soft foam, the seat polyurethane soft foam extends toward an outer wall of both sides of the seat frame to form an everted rim, and the outer wall of the seat frame is provided with a seat shell.