Remote direct-current power-off system

The utility model provides a remote direct-current power-off system, which belongs to the technical field of electric power communication and comprises a monitoring terminal and a switching power supply, the monitoring terminal comprises a first relay, and the switching power supply comprises a contactor. Wherein each of the first relay and the contactor comprises at least four terminals, namely two control ends and two execution ends, a normally open contact is connected between the two execution ends of the first relay, and a normally closed contact is connected between the two execution ends of the contactor; wherein a first execution end of the first relay is connected with a first control end of the contactor, a second execution end of the first relay is connected with an output end of the voltage monitoring terminal-48V, a second control end of the contactor is connected with a zero potential point, and two execution ends of the contactor are respectively connected with a load loop; according to the uti