The floristic changes on excluded from intensive agricultural production field, after sowing of different clover-grass mixtures, was investigated. On the second year of the experiment, it has been found the great elimination of different species of weeds, at treatment, it has been found the great elimination of different species of weeds, at treatment where clover and grass plants were growing. The best mixture for elimination so dangerous weed as Cirsium arvense (L.) Scop, and Agropyron repens (L.) P. B., was the mixture from 50 % Trifolium pratense L. and 45 % Phleum pratense L. with the addition of Achillea millefolium L. plants.