Geological exploration drilling machine percussion bit

Provided is a geological exploration drilling machine percussion bit. Most of the existing drill bits are directly fixed with a mining tool through threads during installation, and offset between thedrill bits and the mining tool is easily caused due to long-time work or excessive pressure on the drill bits, so that the phenomenon that the drill bits are installed loosely or fall off is possiblycaused, and the geological prospecting process is influenced. Provided is a geological exploration drilling machine percussion bit. The device comprises a base, the drill bit comprises a drill bit body (1) and a mining tool chuck sleeve (2). The drill bit body is composed of a drilling tool (1-1) and a fixing sleeve (1-2). Wherein the fixing sleeve is fixedly connected with the mining tool chuck sleeve through a threaded structure, the drilling tool is fixedly connected with the fixing sleeve through a bolt assembly (3), an inserting cylinder structure (1-3) of the drilling tool is inserted into an inner cavity of the