A photovoltaic rapid shutdown device, applied to a photovoltaic system, wherein the photovoltaic system comprises a plurality of photovoltaic modules connected in series with each other, and the photovoltaic rapid shutdown device comprises: a first switch, a second switch, a bypass diode, an auxiliary power supply, a control circuit, and a communication circuit, characterized in that: one of the plurality of photovoltaic modules serves as a power supplying photovoltaic module, and an output terminal of the power supplying photovoltaic module is connected to an input terminal of the auxiliary power supply; the first switch is connected in series between the power supplying photovoltaic module and an adjacent photovoltaic module of the power supplying photovoltaic module; two terminals of the second switch are connected to a positive output terminal and a negative output terminal of a branch formed by the plurality of photovoltaic modules connected in series with each other, respectively; a cathode of the bypass diode is connected to a low voltage terminal of the adjacent photovoltaic module of the power supplying photovoltaic module, and an anode of the bypass diode is connected to a low voltage terminal of the power supplying photovoltaic module; the communication circuit is configured to receive a shutdown instruction transmitted from outside and transmit the shutdown instruction to the control circuit; and the control circuit is configured to control the first switch to be turned off and the second switch to be turned on when receiving the shutdown instruction. a first switch, a second switch, a bypass diode, an auxiliary power supply, a control circuit, and a communication circuit, characterized in that: one of the plurality of photovoltaic modules serves as a power supplying photovoltaic module, and an output terminal of the power supplying photovoltaic module is connected to an input terminal of the auxiliary power supply; the first switch is connected in series between the power supplying photovoltaic module and an adjacent photovoltaic module of the power supplying photovoltaic module; two terminals of the second switch are connected to a positive output terminal and a negative output terminal of a branch formed by the plurality of photovoltaic modules connected in series with each other, respectively; a cathode of the bypass diode is connected to a low voltage terminal of the adjacent photovoltaic module of the power supplying photovoltaic module, and an anode of the bypass diode is connected to a low voltage terminal of the power supplying photovoltaic module; the communication circuit is configured to receive a shutdown instruction transmitted from outside and transmit the shutdown instruction to the control circuit; and the control circuit is configured to control the first switch to be turned off and the second switch to be turned on when receiving the shutdown instruction. one of the plurality of photovoltaic modules serves as a power supplying photovoltaic module, and an output terminal of the power supplying photovoltaic module is connected to an input terminal of the auxiliary power supply; the first switch is connected in series between the power supplying photovoltaic module and an adjacent photovoltaic module of the power supplying photovoltaic module; two terminals of the second switch are connected to a positive output terminal and a negative output terminal of a branch formed by the plurality of photovoltaic modules connected in series with each other, respectively; a cathode of the bypass diode is connected to a low voltage terminal of the adjacent photovoltaic module of the power supplying photovoltaic module, and an anode of the bypass diode is connected to a low voltage terminal of the power supplying photovoltaic module; the communication circuit is configured to receive a shutdown instruction transmitted from outside and transmit the shutdown instruction to the control circuit; and the control circuit is configured to control the first switch to be turned off and the second switch to be turned on when receiving the shutdown instruction.