The utility model relates to a wire supporting device, and belongs to the field of wire locking devices. The device provides convenience for wire dismounting, and reduces wire installation cost. The wire supporting device comprises an insulating rod, a support rod, and a locking unit. The insulating rod is hinged with the support rod. The hinge joint position forms a first axis. The locking unit comprises an adjusting rod and a locking ring sleeved on the insulating rod. After the locking ring move axially along the insulating rod and is abutted against the support rod, the adjusting rod is fixed on the locking ring. Thus, the locking ring is fixed on the insulating rod.