Abstract: The development characteristics and the economic law of shale gas field are special.The development plan of shale gas field needs synthetic evaluation considering technical index and economic index.Therefore, it is a complex multi-objective optimization project to determine the optimal development plan of shale gas field.Taking a shale gas field in China as an example, in order to determine the optimal development plan, different technical parameters are considered to design multiple development plans for the X shale gas field, and the economic evaluation is carried out on considering different economic parameters.The economic benefits change rule of the development plan under different technical and economic parameters are recognized.A multi-objective optimization method for shale gas development plan based on grey optimization theory has been established.Based on the development index and economic evaluation results, considering the multi-evaluation indexes such as total capacity, production scale, steady production years, EUR, the net present value of finance and internal rate of return, the optimal development plan of the gas field has been determined by using the new established method.