The utility model discloses a kind of rock
mass multistage crushing devices, including support frame, crushing part and conveying part: the crushing part is set in the top of support frame, the crushing part has the
crusher for crushing stone material set in the top of support frame, the bottom of the
crusher is provided with guide slot, the conveying part is set in the side of support frame, the conveying part has the rack set in the side of support frame, the inside of the rack is provided with the conveying belt for conveying stone material, the guide slot is above the conveying belt, the inside of the rack is horizontally rotatably provided with cleaning roller, the surface of the cleaning roller is surrounded by a plurality of bristles, the
bristle is in surface
abutment with the conveying belt, the rack rotates to clean the surface of the conveying belt operation.The utility model is provided with crushing part and conveying part, can realize the efficient crushing and conveying of stone material, the stone material is crushed by
crusher and falls into conveying belt through guide slot, the surface of conveying belt is cleaned by cleaning roller through
bristle, prevent stone material residue from affecting conveying efficiency.