The invention discloses a novel microgrid system and an inverter control strategy and a small signal modeling method thereof, and relates to the field of microgrid static stability analysis. The microgrid system comprises an inverter, a load, an LC filter, a microgrid route and a generalized distributed power supply; the generalized distributed power supply can be connected with a microgrid bus through the inverter; the inverter and the load are connected into the microgrid bus in parallel. A double-loop reverse droop control strategy is adopted for the inverter, and a power outer loop controller is provided with active power-voltage and reactive power-frequency anti-drooping control modes, and a voltage and current inner loop control module is adopted for conducting double-loop control ofvoltage and current. The invention further provides a small signal model for the microgrid system and the double-loop reverse droop control strategy; the stability of the microgrid system and the inverter control strategy of the microgrid system is analyzed through the small signal model; and the adopted anti-drooping control is more beneficial to the active accurate distribution and rapid response of the inverter unit compared with the traditional droop control.