FIELD : nanotechnology; food industry; the medicine.SUBSTANCE : invention relates to nanotechnology, medicine and food industry. Method of producing dry extract nanocapsules of horsetail is characterized by the fact that dry horsetail extract is added to a suspension of sodium alginate in benzene in presence of 0.01 g of glycerol ester with one or two edible fatty acid molecules and one or two citric acid molecules as a surfactant with stirring at 1, 000 rpm, 1, 2-dichloroethane is then poured, the resulting nanocapsule suspension is filtered and dried at room temperature, and the core : shell mass ratio is 1 : 1, 1 : 2 or 1 : 3.EFFECT : method of obtaining nanocapsules of dry horsetail extract is applied.1 cl, 3 ex