Height-adjustable power cable maintenance device

The invention relates to a height-adjustable power cable maintenance device which comprises a lifting platform and a vehicle plate, a steering mechanism and a driving mechanism are arranged at the front end and the rear end of the lower portion of the vehicle plate respectively, and a battery is arranged between the steering mechanism and the driving mechanism. And the driving mechanism comprises a power wheel, a second motor, a first synchronous belt and a crawler belt assembly. The two ends of the bottom of the trolley plate are each provided with a set of power wheels, each set of power wheels is coaxially and fixedly connected with a first belt wheel, the two sets of power wheels are fixedly connected through a connecting shaft, and the connecting shaft is sleeved with a first bevel gear. The second motor is fixedly connected with the bottom of the sweeping board. An output shaft of the second motor drives the power wheels to rotate. The crawler belt assembly is arranged above the sweeping board, and a fi