Based on observation of 33 plots of abandoned farmland in Ansai,a loess region of hills and gullies,sequence of vegetation communities and their relationships with soil environmental factors in these fields were analyzed through f:orrespondente Analysis and Canonical Correspondence Analysis.The results show that there are mainly 4 vegetation communities during 40 years of succession:Artemisia scoparia dominated community(Ⅰ),Lespedeza davurica and Stipa bungeana dominated tommunity(Ⅱ),Artemisiu gmelinii dominated community(Ⅲ)and Bothriochloa ischaemuu dominated community(Ⅳ).The species compositions of the 4 communities displayed relatively strong continuity and progressiveness.In comparison,the soil nnder Community Ⅰ was higher in soil moisture content in 0-200 cm layers and available phosphorus content,Community Ⅱ in total nitrogen and available nitrogen content,Community Ⅲ in total phosphorus content and soil water content in 200-500 cm layers,and Community Ⅳ in available potassium and organic matter content.Organic matter,total phosphorus,available phosphorus and soil water content in 0-200 cm layers are important factors significantly affecting variation of vegetation on abandoned cropland in the hilly-gullied Loess Plateau.To revegetate the land quickly and control soil erosion effectively,it is essential to take measures such as transplanting or sowing C4 plants and applying fertilizers.