In this paper, a distributed relay selection optimization method is proposed for the optimization of service transmission energy in microcellular networks. Taking the transmission energy consumption as the optimization goal under the condition that the user meets his own transmission requirements. The user’?s service transmission requirements, the wireless environment, the location of the relay service node, and other users’choice relays are comprehensively analyzed. The service transmission relay selection distributed optimization model is established. The optimization relay selection game model for energy efficiency of microcellular network is constructed. The game is proved to be an accurate potential energy game. An energy efficiency optimization relay selection distributed optimization decision-making algorithm is designed, and the convergence of the algorithm is proved. Experiment analysis verifies the theoretical analysis of the proposed game model and learning algorithm which show that the proposed algorithm can effectively optimize the relay selection results in a distributed decision-making manner and satisfy the user’s transmission needs.