Steel plate spring, automobile suspension and automobile

The utility model provides a steel plate spring, an automobile suspension and an automobile. The steel plate spring comprises a plate spring, a friction plate, a hoop and a fastener; the plate spring comprises a plurality of main springs and at least one auxiliary spring, the length of the main springs is larger than that of the auxiliary springs, and the main springs and the auxiliary springs are sequentially overlapped according to the length. The friction plates are located between the plate springs. The hoops are located at the two ends of the plate spring and fix the multiple main springs. The fastener is used for fixing the plate spring and the friction plate; the two ends of the auxiliary spring are warped upwards by 10-15 mm towards the main spring. The automobile suspension comprises a lifting lug, an axle and a steel plate spring, one end of the lifting lug is rotationally connected to the end of the main spring, and a plate spring frame in the steel plate spring is framed on the axle through a U-sh