The inner surface of transformer oil tank is made of oil immersed coil core.The anticorrosive coating for inner wall of transformer is a special functional coating applied on the inner surface of transformer oil tank,which can play a certain role in insulation.In this paper,the preparation method of this kind of coating is discussed,which can keep the working temperature of transformer oil tank at 110 oC for a long time,and soak in kerosene medium,the film still has good medium resistance and physical performance.At the same time,it is suitable for the operation in the closed environment of transformer oil tank,and the construction suitable temperature is wide,and the limitation is relatively low.