Car seats can be divided into separate seats and bench seats according to their shape; It can be divided into fixed type, detachable type and adjustable type according to function; According to the number of passengers, it can be divided into single, double and multi-person seats. According to the performance of seats, they have developed from the earliest fixed seats to multi-functional dynamic adjustment seats, including air cushion seats, electric seats, stereo seats, spirit recovery seats, and electronic adjustment seats. It is divided into leather seats and flannelette seats according to material. There are also seats for special objects, such as child seats and racing seats.

The seat must be safe and reliable, with sufficient strength, rigidity and durability, compact structure and minimized mass; All kinds of adjustment mechanisms set up to meet the comfort of drivers and passengers shall have reliable locking devices to ensure safety.