The invention discloses an electric power transformer. The electric power transformer comprises an apparatus shell, wherein central holes are formed in the two ends of the apparatus shell respectively; the central holes are connected with a mounting ring through a group of shock absorption apparatuses; each shock absorption apparatus comprises connecting blocks and a spring; the connecting blocks are arranged at the two ends of the corresponding spring; the mounting ring and a bearing are concentrically arranged; the bearing is rotationally matched with a rotary shaft at the two ends of the transformer; side protective covers are arranged at the two ends of the apparatus shell respectively; a fan barrel and a ventilating frame are arranged on each of the two sides of the apparatus shell separately; a fan is arranged in the corresponding fan barrel; a louver is arranged in the corresponding ventilating frame; and a controller, which is electrically connected with the fans, is arranged in the apparatus shell. The electric power transformer can bear severe vibration; meanwhile, the electric power transformer has multi-angle moving space, so that influence to the transformer from vibration is reduced, and an extremely good buffering effect is achieved; and meanwhile, the electric power transformer has automatic ventilating and heat dissipation functions, so that it is ensured that the transformer can be operated in a cool environment.