The invention relates to a tilting auxiliary supporting device. The tilting auxiliary supporting device comprises a base, a bracket and at least two disc spring assemblies arranged between the base and the bracket. The base comprises a bottom plate and a top plate, and the bottom plate and the top plate are fixedly connected through at least two connecting plates which are distributed at intervals in the horizontal direction. Side plates are fixed to the front sides or the rear sides of the bottom plate, the top plate and the connecting plates. The bottom plate is provided with a first fixing hole. The side plates are provided with second fixing holes. At least two rotation support lugs are fixed on the lower side of the bottom plate and distributed at intervals in the horizontal direction. The rotation support lugs are provided with hinge pin holes. The bottom of the bracket is connected with the upper ends of the disc spring assemblies. The lower ends of the disc spring assemblies are connected with the top plate of the base. The tilting auxiliary supporting device has the advantages of being simple in structure, low in cost and convenient to use and maintain, multiple auxiliary supporting devices can be arranged in an insulating bin at the same time so as to support cargos of different types, and the cargo loading efficiency is effectively improved.