Taking the 81th Regiment of the 5th Agricultural Division in Xinjiang as an object,the importance of data and information about soil fertility in agricultural production was studied.With the aid of the integrated technology of MapInfo & Delphi and assembled GIS modules,a soil fertility information management and fertilization recommendation system was developed for cotton fields of the 81th Regiment of the 5th Agricultural Division in light of the diversity of soil fertility between districts,the laws of the cotton crop absrobing nutrients,the soil nutrient supplying capacity,efficiency of the fertilizers and other various factors.The system integrates soil fertility information management with soil-model-based fertilization recommendation and GIS graphic information management.