Abstract: The database of arable land resources of Mingguang city was build on the basis of information in the Balanced Fertilization On Soil Testing and Second Soil Survey with GIS. Then, fertility evaluation index systems were established in each type of cultivated land area, according to the three major types of cultivated land area characteristics in Ming -guang city(Plain influx of farmland soil type, type of paddy cultivated land area, hilly mountain area of arable land types). The automatic and quantitative valuation procedure was realized by adopting various mathematical models and methods such as system cluster , Analytical Hierarchy Program , fuzzy math, etc and supported by GIS techniques. The area and spatial distribution information of cultivated land fertility were acquired in Mingguang city, and the results were consistent with local conditions according to field survey and analysis. The approach was feasible and effective in cultivated land fertility assessment. This research contributes significantly to scientific management and sustainable use of cultivated land resources.