The invention relates to an inverter and a control method thereof, and relates to the technical field of electronic circuits. The inverter comprises a DC-DC conversion module, and an inversion modulein serial connection with the DC-DC conversion module and including at least two energy storage units in parallel connection and an inversion circuit. Each energy storage unit comprises a first switchtube, a second switch tube and a first capacitor, the first switch tube is connected with the first capacitor in parallel, the second switch tube is connected in series with the parallel-connected first switch tube and first capacitor, the first end of the first switch tube and the second end of the second switch tube are connected with the output end of the DC-DC conversion module, and the second end of the first switch tube is connected with the first end of the second switch tube. The DC-DC conversion module improves the levels of the input voltage of the inverter before the inversion module, the energy storage units in the inversion module further improve the input voltage level of the inverter, and the output voltage of the inverter has gain in the wide range.