Sample fragmentation device for geological mineral exploration and use method

The invention relates to the technical field of ore crushing equipment, and provides a sample crushing device for geological mineral exploration and a using method, and the sample crushing device comprises a jaw type crushing mechanism, a transmission mechanism, a screening assembly, a material returning mechanism and a crushing mechanism. When the jaw type crushing mechanism crushes rocks, the screening assembly can be driven through the transmission mechanism, screening work is achieved, and the inclined screen is effectively prevented from being blocked in a shaking mode. And moreover, the crushing mechanism can be driven, so that the compression roller can roll along the upper end wall of the supporting plate, fine particles screened from the screening assembly on the lowermost side are crushed, the rocks are made into powder, and therefore the rocks for mining can be fully classified and utilized. When the screening assembly is driven by the jaw type crushing mechanism, the screening assembly can drive t