Oil immersed type testing transformer

The utility model discloses an oil immersed type testing transformer. The oil immersed type testing transformer comprises a box body, a box body, dead bolts, iron cores and an exhaust oil conservator. The dead bolts are fixedly installed on the two sides of the box body, coils and guide pipes are sequentially wound around the outer sides of the iron cores in the box body, cooling fins are arranged on the outer wall of the box body, the upper end in the box body is inflated with inert gas, high-voltage insulator wire connectors and low-voltage insulator wire connectors which are connected with the coils are installed at the upper end of the box cover, a protection cover with convex holes is arranged on the outer sides of the high-voltage insulator wire connectors, wiring caps matched with the convex holes are arranged on connector lugs, and a pressure exhaust device is arranged on the exhaust oil conservator between the protection cover and the dead bolts. By the adoption of the oil immersed type testing transformer, gas pressure in the transformer can be adjusted, the transformer is effectively prevented from being damaged, stability performance is good, and service life is long.