The invention discloses a novel power transformer. The novel power transformer comprises a power transformer body, a shell, a protection shell, a temperature compensation system, storage batteries andsingle chip microcomputers; a high-voltage group, a low-voltage group and heat dissipation sheets are arranged in the power transformer body; a first iron core, a first coil, high-voltage binding posts and a control chip are arranged in the high-voltage group; a second iron core, a second coil, low-voltage binding posts and a control chip are arranged in the low-voltage group; ventilating ports with protection nets are arranged on the left and right sides of the shell and the protection shell; ventilating ports with fans are arranged on the upper and lower sides of the shell and the protection shell; and a winding electroplating type multi-connecting-point electric pile, hot connecting points, cold connecting pints and temperature sensors are arranged in the temperature compensation system. The novel power transformer has the remarkable advantages as follows: by adoption of the temperature compensation system, the problems of incomplete pressure conversion and low efficiency caused byincreasing of the resistance due to a large amount of heat generated in the voltage transformation process can be solved; and by adoption of a sound insulation layer, sound generated in the machine operation can be lowered.