Accurate positioning fixture for stone drilling

The utility model particularly relates to an accurate positioning fixture for stone drilling, and solves the problems that the drilling quality is difficult to guarantee, the labor intensity is high and the construction efficiency is low in the existing stone drilling process. A steel ruler guide sleeve is fixed on the upper end surface of the channel-steel-shaped positioning bracket; an L-shapedpositioning plate is horizontally arranged in the steel ruler guide sleeve, a positioning steel ruler is fixed to the upper end face of the L-shaped positioning plate, a conical observation hole withthe inner diameter of the upper side larger than the inner diameter of the lower side is formed in the upper end face of the steel ruler guide sleeve, and a locking bolt tightly attached to the steel-channel-shaped positioning steel ruler is screwed on the steel ruler guide sleeve. A stone positioning bolt is screwed upwards on the lower end face of the channel-steel-shaped positioning support, alocking nut tightly attache