Due to the influence of the marine environment, marine gas turbine lubricants are required to have good thermal conductivity. However, the current research on marine gas turbine lubricants mainly focuses on its corrosion resistance. Therefore, a real-time numerical simulation of thermal conductivity of marine gas turbine lubricating oil under complex sea conditions is proposed. In this paper, the turbulent kinetic energy equation and the loss transport equation are obtained by introducing the turbulent column and the k-e model. The Nusselt number in the k-e model can be regarded as the ratio of convective heat transfer between fluid and solid wall and internal heat transfer of fluid. According to the equations, the transient heat transfer model of vertical moving contact parts is established, and the heat transfer relationship between lubricating oil and plug group is obtained. The experimental results show that the area of low temperature in this scheme is larger than that in the traditional scheme, which means that the efficiency of impingement cooling is improved after the introduction of the pin structure in the impingement cooling design. The heat transfer process on the suction surface is stronger than that on the pressure surface, and the heat transfer coefficient of the blade increases continuously, reaching the local maximum value at about X/L = 0.65.