The purpose of the study is to analyze the abrasion processes in the regions of dynamically changing Alakol lake shores. Using the field method, methods of positioning by the GPS receiver and interpretation of remote sensing data, the authors determined that abrasion processes actively contributed to the formation the modern landscape, causing the occurrence of landslide processes due to trimming coastal cliffs. It influences the dynamic mode of coastline, which currently stands in the sea or in the form of capes in the areas of solid rock, or juts out into the bay with a beach by narrow pebble beaches. The results showed that the lakeshores retreated to 60-100 m (from 1990 to 2015). The suggested method of installation reefs may help to increase bio-productivity, to perform the functions of self-purification of seawater and to reduce the process of destruction of the shores of Alakol lake.