Power transformer insulation protection device

The invention belongs to the technical field of transformer protection, particularly relates to a power transformer insulation protection device, and aims to solve the problems that an existing transformer insulation protection device is poor in heat dissipation effect and cannot fully protect a transformer. The power transformer insulation protection device is characterized by comprising a power distribution box, wherein a supporting frame is fixed to the inner wall of the bottom part of the power distribution box through bolts, a transformer body is arranged on the outer wall of the top part of the supporting frame, electric telescopic rods are fixed to the four corners of the inner wall of the top part of the power distribution box through bolts, pressing plates are fixed to one ends of piston rods of the electric telescopic rods through bolts, mounting grooves which are distributed at equal intervals are formed in the outer wall of the bottom part of the power distribution box, heat dissipation pipes are