Power-on/power-off driving circuit and control method therefor

The invention discloses a power-on/power-off driving circuit and a control method therefor, and belongs to the field of the electronic technology. The power-on/power-off driving circuit comprises a load, a switch circuit, a relay and a single-source driving circuit, wherein one end of the load is connected with the positive electrode of a first external power supply; the first input end of the switch circuit and a normally open contact of the relay are connected with the other end of the load separately; the output end of the switch circuit and a normally closed contact of the relay are connected with the negative electrode of the first external power supply; one end of the coil in the relay and the first input end of the single-source driving circuit are connected with the positive electrode of a second external power supply separately; the other end of the coil in the relay is connected with the second input end of the single-source driving circuit; the first output end of the single-source driving circuit is connected with the second input end of the switch circuit; the second output end of the single-source driving circuit is connected with the output end of the switch circuit; and the third output end of the single-source driving circuit is connected with the negative electrode of the second external power supply. According to the power-on/power-off driving circuit, the volume of the power-on/power-off driving circuit is reduced.