The output of new energy has strong uncertainty, and the enthusiasm of standby units can be guaranteed through fair and reasonable benefits. However, the traditional benefit distribution method is only based on the trading volume, which cannot guarantee the enthusiasm of the reserve units to participate. Therefore, based on Shapley value method and Solidarity value method, this paper introduces cost, contribution and risk factors to construct an improved allocation method. Secondly, the structure and trading strategy of new energy micro grid are designed, and the net benefit calculation model and operation optimization model are constructed. Finally, an industrial park in a province in northern China is selected for example analysis. The results show that: (1) The gas turbine provides backup for the clean energy unit, which effectively improves the clean energy consumption space and the net benefit of the system, but the gas turbine’s own consumption space is occupied and the benefit is reduced; (2) The comprehensive improved Shapley value method increases the benefits of gas turbines and improves the enthusiasm of gas turbines to participate.