In view of the abundant vegetation and mountainous hills in the plateau and mountainous areas, which cause serious path loss to communication users, increase the energy consumption of communication systems. This paper proposes an optimization algorithm based on energy efficiency (EE). First, the multi-peak diffraction model is used to simulate the transmission loss of radio waves in the plateau and mountainous areas. Under the premise of ensuring the quality of server (QoS) for communication users, the total energy efficiency of the D2D user equipment in the system is maximized, and the optimization problem is decomposed into power. Two subproblems of control and channel selection are solved. Secondly, the Lagrangian duality and Dinkbach algorithm are used to jointly solve the power control. Finally, on the basis of power control, the Gale-Shapley matching algorithm is used to achieve channel matching. The simulation results show that compared with the existing algorithms, the proposed algorithm can effectively restrain co-channel interference, increase the utilization of channel resources in the system, improve the energy efficiency of the system, reduce system energy consumption, and improve system performance.