The invention relates to a high-altitude multi-cable snow removing device, and belongs to the technical field of line snow removing. The high-altitude multi-cable snow removing device comprises a base plate, arm shafts and snow removing ropes, and is characterized in that the top of the base plate is provided with a power supply and a single-chip microcomputer system, the bottom of the base plate is provided with a roller motor and a speed reducer, the power supply is electrically connected with the single-chip microcomputer, a motor switch is electrically connected with the roller motor, the roller motor is connected with the speed reducer, both ends of the speed reducer are provided with a roller, the base plate is provided with high-altitude telescopic rods, the top of each high-altitude telescopic rod is provided with a positioning arm, the top of the positioning arm is connected with a connecting rear arm through a shaft, the top of the connecting rear arm is connected with a connecting front arm through a shaft, the positioning arm is provided with a rear cylinder fixing bracket, the rear cylinder fixing bracket is provided with a rear arm air cylinder, the connecting rear arm is provided with a front cylinder fixing bracket, the front cylinder fixing bracket is provided with a front arm air cylinder, the snow removing rope is arranged at two ends of the connecting front arm, and the single-chip microcomputer system is electrically connected with the rear arm air cylinders and the front arm air cylinders. The high-altitude multi-scale snow removing device solves a problem of low cable snow removing efficiency at present, is high in automation degree, can perform snow removing on multiple cables simultaneously through simple operations, reduces the labor and is good in snow removing effect.