FIELD: separation of bulk materials in gas flows. SUBSTANCE: invention can be used in construction, chemical, mining, metallurgical and other industries for multi-product fractionation of bulk materials by size. A multi-product classifier of bulk materials includes a classification shaft equipped with a system of rigidly fixed coaxial, base-facing, truncated pyramids, forming slot gaps along the perimeter, a branch pipe for supplying the initial bulk material, a distributor of the initial bulk material. The pyramids inside the common body are separated by vertical partitions with the formation of several independent separation channels with their own air flow outlet pipes and nozzles for the removal of large fractions of bulk material. Along the perimeter of the distributor, vertical boards are installed in the form of segments of a circle. EFFECT: increase in the efficiency of fractionation of bulk materials, an increase in the amount of simultaneously obtained separation products. 2 cl, 3 dwg.