The utility model relates to gold mining technical field, and disclose a device for plugging drilling hole, including the plugging cylinder, the top fixedly connected with the plugging pressure plate of plugging cylinder, the top fixed mounting of plugging pressure plate has the connecting thread seat in the central position, the upper and lower end central position of penetrating the connecting thread seat and plugging pressure plate is provided with the plugging screw rod, the bottom fixed mounting of plugging screw rod has the connecting rod, the bottom of connecting rod is installed with the plugging block through the connecting bolt, through plugging screw rod, connecting rod, plugging block, plugging cylinder, expansion slot, can be from inside to outside and plugging cylinder is expanded, need not to hit with great force, reduce the damage probability, reduce personnel labour intensity at the same time, when plugging drilling hole, will not
rust, service life is higher, can improve the friction, reduce the probability that plugging cylinder slips out drilling hole, further reduce the probability of
groundwater leakage, facilitate the improvement sealing effect.