Huanren County was chosen as a typical area in the eastern mountainous areas of Liaoning and the slope cultivated land fundamental fertility characteristics were evaluated under different slop grade levels in order to clarify the situation of slope cultivated land fundamental fertility. With the support of ArcGIS 10 and Excel software, Methods of DELPHI, analytic hierarchy process (AHP) and fuzzy evaluation (FE) were used and 13 evaluation indicators in 4 types were selected, including nutrients in arable layer, physical and chemical characteristics in arable layer, soil management and site conditions. The results showed that slope cultivated land fundamental fertility was classified into five grades, and mainly were the 3rd, 4th and 5th grades, accounted for 21.49%, 50.73% and 20.39% respectively, while the 1st and 2nd grades were less, accounted for 0.81% and 6.58% respectively. The distribution of slope cultivated land was mainly beyond 5°, the 1st grade was mainly in 2°-8° (accounted for 0.81%), the 2nd and 3rd grades were mainly in 2°-8° (accounted for 13.17%), and the 4th and 5th grades were mainly above 15° (accounted for 58.78%). The assessment method established here could be extended into other similar regions in fertility evaluation of cultivated land, and could provide beneficial references on research in slope cultivated land.