The invention relates to medicine and chemical and pharmaceutical industry, in particular, to methods for producing a complex of biologically active substances exhibiting hypoglycaemic activity of plant material. A method for producing a complex of biologically active substances exhibiting hypoglycaemic activity comprises extracting bean herb with alcohol followed by concentrating and/or drying the extract, wherein the extraction is carried out with 96% alcohol resulting in a first extract and a bean herb residue, wherein the first extract is concentrated resulting in a first solid extract or it is concentrated and dried resulting in a first dry extract and the bean herb residue is extracted with 70% alcohol resulting in a second extract at least a portion of which being concentrated resulting in a second solid extract or being concentrated and dried resulting in a second dry extract.