Geographical information systems (GIS)-based soil erosion risk assessment models continue to play an important role in soil conservation planning. In the present study, soil erosion risk of Tange Bostanak watershed was determined within GIS-based Coordination of Information on the Environment (CORINE) soil erosion risk assessment method. The initially soil texture, soil depth and surface stoniness maps were created and intersected in GIS environment in order to generate an erodibility map. Then, Fourinier precipitation and Bagnouls Gaussen drought indicces were determined based on meterological data and erosivity was calculated. The composed erodibility map was co-evaluated within erosivity value and slope map of the site for composing potential erosion risk map. At the final step, the previous yearly land use maps from1988 and risk alternation were assessed. In conclusion, according to our results in Tange Bostanak watershed in 1988 the low, medium, and high erosion risk values have changed. In 2007 there have been low, medium, and high erosion risks at 0.82, 93.99, and 5.18 respectively, whereas in 2007 there have been low, medium, and high erosion risks at rates 0.15, 89.99, and 9.84%, respectively values have changed. i. Inter yeat comparison al of ternation to increase advantage of the medium and high erosion.