A method for detecting a short circuit of an inverter, applied to an inverter, wherein the inverter comprises a plurality of boost circuits (11; 121), a common bus, and a direct current/alternating current inverter module, output sides of the plurality of boost circuits (11; 121) are all connected in parallel with the common bus, the common bus is further connected in parallel with the direct current/alternating current inverter module, a direct current is input into an input side of each boost circuit (11; 121), the boost circuit (11; 121) is configured to: after performing boost processing on the direct current, send the direct current to the direct current/alternating current inverter module by using the common bus, the direct current/alternating current inverter module is configured to: convert the boosted direct current into an alternating current, and then output the alternating current, and the method comprises: when the plurality of boost circuits (11; 121) are all in a non-working state, increasing a voltage of the common bus from a first voltage to a second voltage, wherein the first voltage is equal to a highest voltage in voltages of the input sides of the plurality of boost circuits (11; 121); detecting a circuit parameter of the input side of each boost circuits (11; 121) in the plurality of boost circuits (11; 121); characterised by detecting a short-circuited boost circuit (11; 121) in the plurality of boost circuits (11; 121) based on the circuit parameters of the plurality of boost circuits (11; 121); and wherein the increasing a voltage of the common bus from a first voltage to a second voltage comprises: detecting a first boost circuit (11; 121) whose input side has a lowest voltage in the plurality of boost circuits (11; 121); and switching the first boost circuit (11; 121) to a working state, wherein a direct current that is output by the first boost circuit (11; 121) to the common bus in a working state is used to increase the voltage of the common bus from the first voltage to the second voltage. when the plurality of boost circuits (11; 121) are all in a non-working state, increasing a voltage of the common bus from a first voltage to a second voltage, wherein the first voltage is equal to a highest voltage in voltages of the input sides of the plurality of boost circuits (11; 121); detecting a circuit parameter of the input side of each boost circuits (11; 121) in the plurality of boost circuits (11; 121); characterised by detecting a short-circuited boost circuit (11; 121) in the plurality of boost circuits (11; 121) based on the circuit parameters of the plurality of boost circuits (11; 121); and wherein the increasing a voltage of the common bus from a first voltage to a second voltage comprises: detecting a first boost circuit (11; 121) whose input side has a lowest voltage in the plurality of boost circuits (11; 121); and switching the first boost circuit (11; 121) to a working state, wherein a direct current that is output by the first boost circuit (11; 121) to the common bus in a working state is used to increase the voltage of the common bus from the first voltage to the second voltage. detecting a first boost circuit (11; 121) whose input side has a lowest voltage in the plurality of boost circuits (11; 121); and switching the first boost circuit (11; 121) to a working state, wherein a direct current that is output by the first boost circuit (11; 121) to the common bus in a working state is used to increase the voltage of the common bus from the first voltage to the second voltage.