Steel frame snowmobile frame and steel frame snowmobile with same

The invention provides a steel frame snowmobile frame and a steel frame snowmobile with the same, the steel frame snowmobile frame comprises a frame body, the frame body comprises two cross beams and two longitudinal beams, the cross beams are connected between the two longitudinal beams, and a frame structure is defined by the cross beams and the longitudinal beams; the number of the adjusting parts is multiple, all the adjusting parts are detachably connected with the cross beam, and the length direction of the adjusting parts is arranged in the length direction of the cross beam; wherein at least one of the mass and the rigidity of at least one of the adjusting parts is different from the mass and the rigidity of the other adjusting parts, so that the rigidity of the frame body is changed by replacing the matched connection of the adjusting parts and the cross beam. According to the steering frame, the frame body is matched with the multiple adjusting pieces, the adjusting pieces are detachably connected w