Composite blade spring suspension system

The utility model provides a composite blade spring suspension system. The composite blade spring suspension system comprises a blade spring front support (1), a blade spring rear support (8), a composite blade spring (3) and auxiliary spring supports (2), wherein the blade spring front support (1) and the blade spring rear support (8) are mounted on the front side and the rear side of a frame (9); the composite blade spring (3) is provided with a first part and a second part which are arranged up and down along the vertical direction; the middles of the first part and the second part are connected by a bolt; one end of the second part is hinged to a lug hole of the blade spring front support (1) by a hook by virtue of a spring pin; the other end of the second part is connected with the lower end of a lug (7) by a hook; the two auxiliary spring supports (2) are respectively arranged above two ends of the first part, and are respectively connected with the frame (9) in a fastening way, so that two ends of the first part are abutted against by the auxiliary spring supports (2); the middle of the composite blade spring (3) is connected with a drive axle (4) by a U-bolt (6) and a blade spring press plate (5) in a fastening way. Under the premise of meeting the reliability of a vehicle, the composite blade spring suspension system is capable of relieving the weight of a suspension, reducing the oil consumption and noise, and the like.