The invention discloses a method for controlling a single current sensor double-decompression bridge-type inverter, which belongs to methods for controlling inverters. The invention adopts a single current sensor to collect inverter inductor current, and an output voltage outer ring receives an inverter output voltage feedback signal and an output voltage set signal, and outputs a set inductor current. An inductor current inner ring receives the set inductor current and the inductor current feedback signal, and outputs a logic control signal. The power switch tube drives a logic circuit to receive the logic control signal, the inductor current feedback signal and the output voltage feedback signal, and to output high and low level actuating signals of each power switch tube. The method only needs a current sensor, the cost is reduced, simultaneously, the volume and weight of a filter can be reduced through adopting the control method, and the efficiency of the inverter is improved.