The present invention relates to a supporting device with a buffering function. The supporting device with the buffering function comprises a body and a buffering device. The body is cylindrical and is arranged between an upper supporting plate of an internal part of a container and an upper part of the container, the lower portion of the body is connected with the upper supporting plate of the internal part of the container, and the buffering device comprises a plurality of toothed structures. The toothed structures are arranged at the upper portion of the body along the upper periphery of the cylindrical body. The toothed structures comprise a plurality of sets of teeth of different tooth heights and different tooth types, wherein the toothed structures with the larger tooth height have the higher elastic deformation capacity so as to absorb acting force caused by heat displacement differences and installation errors, and the toothed structures with the smaller tooth height have the higher rigidity so as to limit the upper supporting plate of the internal part of the container when bearing large transient impact force.