The effect of thermal conductivity of anti-corrosion coating on the surface of the panel type radiator on the cooling capacity was studied by using Fluent simulation software. Obtained results showed that, under the same structure and parameters, the radiator cooling capacity was greatly reduced by the thermal conductivity of the smaller anticorrosive coating. Increasing the thermal conductivity of an-ti-corrosive coating can reduce the fan power or the number of the number of fins while ensuring the heat dissipation effect of the panel type radiator, which was beneficial to the energy saving and minia-turization design of the transformer. In this paper, the temperature distribution inside the panel type ra-diator were studied by using numerical simulation software. The re-search results can provide reference for the design of transformer panel type radiator.