Fracture type aluminum auxiliary frame with rear end fixing structure

The utility model belongs to the technical field of automobile parts, and particularly relates to a crumple type aluminum auxiliary frame with a rear end fixing structure. Comprising an auxiliary frame body and further comprises a sleeve used for connecting the auxiliary frame and a vehicle body structure, the sleeve is arranged at the rear end of the auxiliary frame body, the two ends of the sleeve extend towards the auxiliary frame body to form a first connecting arm and a second connecting arm respectively, and a connecting plate is arranged between the first connecting arm and the rear end of the auxiliary frame body and between the second connecting arm and the rear end of the auxiliary frame body. A special-shaped hole is formed in the connecting plate, and an auxiliary frame mounting positioning pin is arranged between the first connecting arm and the sleeve; the aluminum alloy auxiliary frame is adopted, the weight of the auxiliary frame structure is effectively reduced, meanwhile, the characteristic