This thesis studied ecological effect of high ridge chernozem by control test of corn continuous cropping.The result indicated that grass and crop rotation improves aperture condition of soil,to improve the condition of much air draft and drought and sand,because of abstract ability of keeping water on the chernozem of bad water erosion and wind erosion.Grass and crop rotation could increase the quantity of soil microorganism,intensify its activation,improve soil enzyme activity,enhance biological activity of soil and establish better soil environment condition.