We report the results of the paleo-ecological reconstruction of the string-bog complex in the southern taiga subzone of Western Siberia based on using, as an example, the two peat sections: Mozhachina and Gryada. Analysis of the botanical composition of plant remains, and radiocarbon dating revealed the characteristic features of the stratigraphy of peat deposits and the dynamics of vegetation development. Results of a qualitative analysis of Testacea communities, coupled with data on the degree of humification and humidification, were used in reconstructing and quantitatively assessing the paleohydrological conditions of peat deposits. The elemental chemical composition revealed a similarity of peat deposits in geochemical conditions of development. We revealed a connection of the Sr/Ba ratio with paleohydrological parameters of peat sections of the string-bog complex.Keywords: string-bog complex, peat deposits, botanical composition, Testacea, chemical elements, Western Siberia.