The control strategy for parallel system of three-phase inverters based on active disturbance rejection controller is proposed. The method firstly monitors the real-time instantaneous output voltage and current of each inverter module and obtains the instantaneous active power and reactive power, then adjusts the instantaneous active power and reactive power to achieve current sharing and power sharing between each module of the parallel system. In order to improve control precision, the method applies active disturbance rejection controller to replace the conventional PI controller, and simulation results show that it is capable to control current sharing effectively and the parallel system operates steadily.