This paper proposes a power decoupling and reactive power control method for a single-phase inverter with power decoupling capability. In the proposed method, a closed-loop feed-forward power decoupling control strategy is designed and realized through the d-q transformation method for the single-phase AC system, so the traditional PI controller can be used to replace the PR controller to eliminate the steady-state error. Meanwhile, a high-quality AC current and the independent control of active and reactive power can be achieved. Simulation results prove the effectiveness and correctness of the proposed control strategy.