The utility model relates to a rat repelling device for transmission line, including fixed buckle and connecting portion, connecting portion include horizontal plate and height -adjustable's vertical portion, and vertical portion includes first telescopic link and second telescopic link, and the horizontal plate setting is on first telescopic link, and second telescopic link fixed connection is equipped with on the first telescopic link and drives the subassembly on the horizontal plate, is equipped with on the horizontal plate to make the power supply module who drives the subassembly circular telegram, is equipped with the push pedal on the second telescopic link, the utility model discloses an advantage: the subassembly of driveing through being equipped with on the connecting portion is realized driveing the processing to the mouse, and the effectual transmission line that has guaranteed does not receive the damage, has guaranteed transmission line's normal operating, and the setting of push pedal can effectually avoid debris to power supply module's damage, has improved power supply module's life.