FIELD : nanotechnology. SUBSTANCE : invention relates to nanotechnology, medicine and food industry. Method for producing nanocapsules of dry extract of horsetail is characterized by that dry extract of horsetail is added to a suspension of guar gum in petroleum ether in presence of 0.01爂 of glycerol ester with one or two molecules of food fatty acids and one or two molecules of citric acid as surfactants while stirring at 900爎pm, then, coolant-112 is added, obtained suspension of nanocapsules is filtered and dried at room temperature, wherein weight ratio of core to shell is 1 : 1, 1 : 2 or 1 : 3. EFFECT : disclosed is a method for producing nanocapsules of horsetail dry extract. 1 cl, 3 ex