Automatic power cable pay-off device and operation method thereof

The invention discloses an automatic power cable pay-off device and an operation method thereof. The automatic power cable pay-off device comprises a mounting bottom plate, a door-shaped vertical frame, a door-shaped vertical frame moving mechanism, a middle adaptation part, a lifting mechanism, a supporting part, a braking mechanism, a sensing part and a control part. The door-shaped vertical frame is installed on the mounting bottom plate and provided with the door-shaped vertical frame moving mechanism. Under the action of the door-shaped vertical frame moving mechanism, the door-shaped vertical frame can move left and right. The middle adaptation part is used for being connected with a cable reel so as to improve the universality of the device. The lifting mechanism is used for drivingthe cable reel to be lifted to a certain height, and the braking mechanism is matched with the sensing part so that uniform-speed cable paying-off can be achieved. Due to the fact that the cable reelis not directly braked, d