Car seats can be divided into separate seats and long seats. According to the function can be divided into fixed type, detachable type, adjustment type; The number of seats can be divided into single, double and multiplayer chairs. According to the use of seat performance, from the earliest, the stationary seat has been developed to the multi-function power adjust seat, with air cushion, electric seats, stereo seat back seat, spirit, until the electronics to adjust seat. The material is divided into leather seats and flannelette seats. There are also seats for special use objects such as child seats and car seats.