Abstract: As a result of the performed researches a method for manufacturing of a extruded poly-cereal product was developed which firstly, reduces irrational power consumptions, ensures food products expansion and improves nutritive quality by combining several types of coarse whole meals of grain crops; secondly, supports starch modification and gelatinization, lowers the ratio of unassimilable compounds and content of microorganisms in poly-cereal mixtures; thirdly, raises the degree of preparation of poly-cereal based food products which significantly improves marketable and organoleptical properties of the quality.