Geological reamer

The invention relates to the technical field of geological exploration equipment, in particular to a geological reamer. The geological reamer comprises a sealing device, wherein a hole is formed in the top of the sealing device, a T-shaped connecting rod is arranged in the hole, and the bottom end of the T-shaped connecting rod is connected with one end of a connecting column; the other end of theconnecting column is connected with a hydraulic cylinder, the hydraulic cylinder is connected with one end of a hydraulic rod, the hydraulic rod is connected with a supporting plate in a driving mode, and the bottom end of the supporting plate is connected with a motor; and the motor is connected with a rotating shaft, and a drilling device is arranged on the rotating shaft. The drilling device comprises a conical drilling body, and the side wall of the conical drilling body is in threaded connection with a cutting nail. The geological reamer is convenient to use, has complete functions and can effectively isolate du