Abstract. M. In this article. S. The life path, scientific activity of Andreyev is highlighted, and information is described that he studied the language of the regions in different regions of Central Asia, that is, as a result of his work in schools, ethnological activities. Also the Ethnology of the khuftian people of the Tajiks, first known to science through the work” Tajiks of the Khuf Valley", is the result of the activist activity of the scientist.