Separating bed of mineral separator

The invention discloses a separating bed of a mineral separator. The separating bed of the mineral separator comprises a right trapezoid-shaped bed surface, the beveled edge of the right trapezoid is the discharge edge of the separating bed, a discharge baffle plate is arranged at the side of of the discharge edge, the side of the right-angle edge opposite to the discharge edge is provided with a backboard for guiding materials to turn upwardly, the wider bottom edge of the bed surface is the feed edge, the narrower bottom edge is the discharge end, a plurality of air holes are opened in the bed surface, and the air hole size and the perforation rate can be different from the material baffle backboard to the discharge end so as to effectively separate mixture composed of materials with different densities and particle sizes. The separating bed of the mineral separator is capable of effectively overcoming the problem of narrow application range of an existing separating bed surface, is capable of selecting a reasonable bed surface inclination angle, enables the separation quantity to be improved, and enables the separating precision to be improved.