For more efficient extraction process, forecasting and regulation of the quality of the extract of burdock as a result of researches the technological properties of the leaves of burdock: bulk density – 0,23 g/cm3 filling ratio of dry material – 3,42 cm3/g; the filling ratio of the swollen material – 1,92 cm3/g; displacement ratio of raw material – 1,04 cm3/g; the absorption coefficient – 2,76 cm3/g; the coefficient of Education internal juice – 3,06 cm 3/g; ratio increased by dissolving extractives – 0,56 cm3/g.