The invention discloses an LC grid-connected inverter control method. The method comprises the steps that an LC grid-connected inverter outer loop actually-measured grid-connected current signal igrid and an LC grid-connected inverter reference current signal iref are compared to acquire a first error signal, and the first error signal is acted by a regulator to acquire an inner loop reference input signal; the inner loop reference input signal and an inductor current signal iL are compared to acquire a second error signal; the second error signal is compared with a triangular wave to generate a PWM control signal; and the PWM control signal controls the output voltage of an LC grid-connected inverter. According to the LC grid-connected inverter control method provided by the invention, the in-grid current quality of the grid-connected inverter is improved, and the total harmonic distortion of in-grid current is reduced.