In the parallel system of inverters with traditional droop control strategy,the current sharing effect is poor during steady-state operation.And the transient process of parallel system is long, which affects the reliability and stability of the system.After analyzing the traditional droop control, The output impedance of a single inverter is changed into pure resistance by introducing Virtual complex impedance .And then, a power PID correction combined with PI control algorithm is proposed under the condition of resistive output impedance.The simulation is done in MATLAB, and the simulation results verify the feasibility and effectiveness of the proposed scheme.