Main stages of post-glacial development of the shelf topography in the East Siberian and Chukchi seas are considered. New data permit to trace the submerged coastlines (dated back to the last transgression) and to understand the neotectonic and environmental impact on the relief evolution. Sedimentary formations structure indicates that the sea shelves in the Eastern Soviet Arctic are not only zones of transit of sediments but also a very large area of sedimentation.