Rear suspension system and vehicle with same

The utility model provides a rear suspension system and a vehicle with the same, the rear suspension system comprises a steering knuckle, the middle of the steering knuckle is provided with a connecting hole, the steering knuckle comprises a brake caliper connecting support, one end of the steering knuckle located at the brake caliper connecting support is provided with a first mounting position, and the first mounting position is used for mounting an upper control arm; a first included angle alpha is formed between the axis in the length direction of the upper control arm and the axis of the connecting hole and is larger than or equal to 25 degrees and smaller than or equal to 35 degrees. According to the technical scheme, after the upper control arm is installed, the first included angle is formed between the axis in the length direction of the upper control arm and the axis of the connecting hole, the angle of the first included angle ranges from 25 degrees to 35 degrees, and therefore more space can be re