Lifting device for mobile small and medium-sized transformer

The invention discloses a lifting device for a mobile small and medium-sized transformer, comprising a first cantilever bracket, a second cantilever bracket and the lifting device, wherein the first cantilever bracket comprises a cantilever beam, and supporting brackets which are arranged at two ends of the cantilever beam; each of the supporting brackets comprises an inner pipe and an outer pipe which are mutually connected in a sleeving manner; each inner pipe can slide up and down relative to the corresponding outer pipe; each of the supporting brackets is provided with a fixing device which is used for fixing the position of the corresponding inner pipe; one end, far away from the cantilever beam, of each supporting bracket is a triangular supporting leg; the size and the structure of the second cantilever bracket are the same with those of the first cantilever bracket; the supporting brackets of the first cantilever bracket are connected with the supporting brackets of the second cantilever bracket through connecting members, so that the distance between the first cantilever bracket and the second cantilever keeps constant; the lifting device comprises two lifting groups with the same size and structure; one end of each lifting group is arranged on the cantilever beam of the first cantilever bracket and the cantilever beam of the second cantilever bracket in the sleeving manner; the other end of each lifting group is connected and fixed with a lifting transformer.