Novel chiseling tool capable of being used for water stop screw hole

The novel chiseling tool comprises a Y-shaped drill bit and a driving electric drill, the output end of the driving electric drill is fixedly connected with a mounting block, the lower end face of the Y-shaped drill bit is fixedly connected with a drill rod, the upper end face of the mounting block is provided with a mounting groove, and the lower end face of the mounting block is fixedly connected with the drill rod. And two cavities are symmetrically formed in the mounting block, and a worm is rotationally connected to the inner wall of each cavity. According to the utility model, the size of the Y-shaped drill bit in the device is slightly larger than that of the plastic plug of the water stop screw rod, so that the chiseling depth can meet the requirement; when the tool is used, the tool is connected with an electric drill, then the electric drill is perpendicular to a hole needing to be scabbled, the hole can be scabbled, the hole scabbling effect is improved, the quality defects that mortar and concrete