Abstract: With the reform of renewable energy policy, it is a developing tendency to improve the diversified green trading system to replace financial subsidies. This paper takes the DC microgrid as the research object and proposes an optimal configuration method under a diversified green trading system. Firstly, the status quo of China's diversified green trading system is analyzed, and the three modes for DC microgrids to participate in the green trading market are proposed. Then combining the related policy rules and market supply and demand, the market price mechanism is analyzed and a single market revenue model is established. Secondly, in order to flexibly respond to the demand for load power supply and renewable energy consumption, a comprehensive energy scheduling strategy is proposed. With the goal of maximizing the annual revenue of the system, the K-means clustering and the improved particle swarm optimization are used to solve the economic optimization configuration model of the system. Finally, the influence of the green trading system and the energy scheduling strategy on the configuration results is analyzed and compared with the simulation results of HOMER. The results of calculation examples verify the effectiveness of the proposed method.