The invention belongs to the power transmission line live working field, and provides a pin removing device for an R-shaped pin insulator insulating rod. The pin removing device comprises an insulating rod which is provided with a screw rod; the screw rod is provided with a sliding nut; one side of the screw rod is provided with a nut slideway in connection with the nut; the lower end of the nut slideway is vertically connected to a hook head slideway which is provided with a sliding hook head; the hook head is in connection with the nut through a steel cable; the rear end of the hook head is provided with a return spring. The pin removing device adopts the operation method of an original pin removing device for a W-shaped pin insulator insulating rod, employs rotation of the nut to drive the hook head to move horizontally, has a simple structure, and is flexible to operate.