The invention discloses a plugging and repairing tool for a bolt hole of bare concrete. The plugging and repairing tool comprises a squeezing end part, an external-corner coping part and a hand-holding part. The shape of the squeezing end part is matched with the shape of a to-be-plugged bolt hole, the external-corner coping part is fixed on the front surface of the squeezing end part, and the hand-holding part is fixed at the center of the external-corner coping part and drives the squeezing end part and the external-corner coping part to rotate on the inner portion and at the orifice of the to-be-plugged bolt hole correspondingly. The plugging and repairing tool for the bolt hole of the bare concrete is a setting tool, plugging of the bolt hole of the bare concrete and the construction operation of repairing of an external corner can be simplified, the bolt hole is ensured to be filled with the blocking materials compactly, effective plugging is conducted, and the construction quality is improved; and a possible damaged external corner of the bolt hole is repaired while the bolt hole is plugged, and the appearance quality of the facing bare concrete is ensured.