Cable take-up and pay-off equipment for mobile power supply

The utility model discloses a mobile power supply cable take-up and pay-off device which comprises a mounting shaft, a winding roll arranged on the mounting shaft and a driving mechanism used for driving the winding roll to rotate. The mounting shaft is also provided with a first conductive member used for connecting an input end cable, a second conductive member used for connecting an output end cable, and an operating mechanism used for driving the second conductive member to contact with or separate from the first conductive member. The use method comprises the following steps: S1, cable release: the driving mechanism drives the winding roll to rotate forwards to release the cable; s2, conducting power transmission: enabling the second conductive part to be in contact with the first conductive part through the operating mechanism, and then enabling the mobile power supply to transmit power; s3, separation: separating the second conductive piece from the first conductive piece through the operating mechanis