The utility model discloses a four-season bus seat. The four-season bus seat consists of a seat surface (1) and a backrest (2). The four-season bus seat is characterized in that transverse sliding rails (3) arranged in pairs are respectively arranged on the seat surface (1) and the backrest (2); a seat cushion (4) matched with the seat surface (1) and the backrest (2) is matched with the transverse sliding rails (3); one surface of the seat cushion (4) is a sponge surface; the other surface of the seat cushion (4) is a plastic surface; check rails (5) are arranged by being matched with the transverse sliding rails (3); bolt holes matched with the transverse sliding rails (3) are also formed in the end parts of the check rails (5). The four-season bus seat is simple in structure, is ingenious in design and can be switched between a plastic seat and a sponge layer seat along with the change of the environment.