Energy piles have been applied in engineering practice as retaining piles,but there is little research at home and abroad. Based on the application of energy retaining piles in Xiongan Urban Computing（Supercomputing Cloud）Center,numerical simulations are conducted to study the excavation of a deep foundation pit and temperature change process of energy retaining piles using COMSOL Multiphysics software. In the excavation simulation,the model parameter setting was optimized by comparing the simulation results with the field measured data,and the"subgrade stiffness partition"modeling method for the foundation soil was proposed. Furthermore,the influence of different temperature loads on the deformation and internal force of the retaining pile is studied. Finally,based on the above analysis results,suggestions are put forward on considering the influence of temperature load on the retaining pile in engineering design calculation. The results show that the modeling method considering subgrade stiffness partition