The maintenance of distribution network is one of the important means to ensure the reliability and economy of power supply. Under the background of the condition based maintenance, In this paper, a game model of distribution network maintenance decision-making is established based on the analysis of the contradiction between equipment operating state and maintenance state. In this model, the maintenance expenses and failure costs are as a function of payment, the device layer and the network layer are the main players, and the number of equipment maintenance, overhaul and maintenance equipment set are taken as a game means. This model is used to solve the contradiction between the state of equipment and the overall interests of the distribution network in the maintenance decision, at the same time, the load transfer scheme considering the output fluctuation of distributed generation is given by the game theory. Based on the analysis of the variation of equipment failure rate, a method for determining the set of dynamic maintenance equipment is presented. Meanwhile, a heuristic algorithm for solving the model of maintenance and repair is presented. Finally, the validity and rationality of the optimization algorithm and the decision method are verified by the simulation analysis of the IEEE 33 node distribution system, and comparative analysis and robustness analysis are carried out in this paper.