Novel sampling device for geological mineral exploration

The novel sampling device structurally comprises a supporting frame, a supporting bottom plate, a buffer rod, a lower pressing plate, a drilling mechanism, moving wheels and a fixing rod, the bottom of the supporting frame is welded to the upper end face of the left side of the supporting bottom plate, a spiral rod drills a hole downwards in a coal mine, and a fixing wall and an opening and closing plate are kept sealed at the upper end of a fixing cylinder; coal particles generated in the drilling process of the screw rod are prevented from floating into surrounding air, after sampling is completed, a wall scraping piece scrapes off the residual coal particles on the surface of the screw rod, the outer wall of the lower end of the screw rod makes contact with abutting teeth, an extrusion ring pair is automatically extruded and adjusted, and the abutting teeth are prevented from strongly colliding with the outer wall of the screw rod; coal particles are downwards guided and discharged into the bearing mechani