In this paper, we introduce the numerical simulation theory and method to achieve the energy deposition and temperature variation produced by the high-energy electron bombarding the anode surface. A simple beam launch model is developed. The accuracy of the numerical calculation of the anode surface electronic energy deposition is primarily validated. Then, selecting the magnetically insulated transmission line in post-hole convolute as a model, the energy deposition and the temperature variation in the anode produced in the process are simulated. Also by comparing the simulation results with the results given in the literature, the simulation accuracy is further proved. Finally, the simulation results are analyzed and the physical mechanism produced by the simulation results is also discussed.