The invention discloses a mineral separating and sampling device. The mineral separating and sampling device comprises a separating and sampling device shell, a motor shell, a servo motor, a barrel cover, a rolling disc, a separation barrel, universal wheels, a supporting frame, a baffle, bottom holes, a waste box, first fixed plates, first rotating bolts, rotating rods, a threaded rod, connectingplates, threaded holes, self-locking nuts, partition plates, second rotating bolts, second fixed plates, a first clamping plate, a second clamping plate, elastic pieces, elastic piece seats, a rubberpad, an anti-slip mat, a clamping groove, separation holes and roller grooves, wherein the barrel cover is arranged at the top of the separating and sampling device shell; the separation barrel is arranged in the separating and sampling device shell; and the motor shell is welded to the center of the top of the barrel cover. The mineral separating and sampling device is simple in structure, time-saving, labor-saving, free of manual screening and high in working efficiency, meanwhile, the separation is more thorough, the subsequent processing of minerals is facilitated, the waste is collectedthrough the waste box, the environment is protected, and the processing and production are facilitated.