Safety pile driver capable of preventing broken stones from splashing

The utility model relates to the technical field of piling machinery, in particular to a safety pile driver capable of preventing broken stones from splashing, which comprises a pile driver body, a first semicircular block and a second semicircular block, and the improved pile driver is characterized in that the first semicircular block and the second semicircular block are slidably connected in a fixed sliding groove through a fixed sliding block to fix a protective device on a drill bit; a sliding block is slidably connected into a sliding groove, a lock sleeve slides to an opening along a guide rail, and a fixing rod is pushed to be movably inserted into a fixing through hole, so that rapid installation of the protection device is achieved, the protection device does not need to be installed and fixed through bolts any more, time is saved, and the installation steps are simplified; the multiple brushes are arranged at the bottom of the protection plate, on one hand, the dense bristles can assist the protec