Aiming at the random factors in micro-grid operation such as fan output and photovoltaic output, a chance constrained programming economic operation model of isolated micro-grid is proposed. It takes the micro-grid including wind turbine, photovoltaic, load, energy storage, micro gas turbine as an example, micro-grid operation cost as the the total objective function, and the unit operation cost, CO2 emission treatment costs during unit operation, and SO2 emission treatment costs of unit as three sub objective functions. The weight of processing the three sub objective functions is processed by using AHP, chance constrained programming is dealt with the Curl-sum operation of sequence operation theory. Finally, the tomlab optimization tool is used to solve the objective function, and the optimal objective of microgrid operation and the output of each micro unit in optimal target are obtained. This work is supported by Science and Technology Project of State Grid Corporation of China (No. 52243714001G).