The invention discloses a sealant cleaner for a bolt through hole. The sealant cleaner for the bolt through hole adopts suspension cutting for gradually removing a sealant attached to the hole wall. The sealant cleaner is characterized in that a fixing ring is screwed to one end of a main body pipe, one end of the main body pipe is provided with a thread ring, and an annular table is arranged between a thread pipe and the main body pipe. The main body pipe is of a circular pipe structure, the inner wall of the main body pipe is provided with a bearing ring, and an outer cutting pipe is placedon the fixing ring and is in a nipple shape. Multiple cutting blades are arranged on cutting rollers in the circumference direction and spirally extend, the end of the outer cutting roller is providedwith a through hole, and a guide ring is arranged on the other end of the main body pipe. An inner ring of the guide ring is of a rectangular structure, the inner cutting roller is placed in the outer cutting roller and fits the inner wall of the outer cutting roller, cutting blades are arranged on the inner cutting roller in the circumference direction and spirally extend, and the spiral direction of the cutting blades on the inner cutting roller is opposite that of the cutting blades on the outer cutting roller.