By establishing the following five dependent functions: feature of increasing output,feature of stabilizing output,importance feature,economy feature and drought resistance feature;and by using mathematical method Fuzzy,this paper calculates major planting crops' ecologic climate & economic superiority of Wuwei town,and shows that the most superior four planting crops in order are corn,sugar beet,cole and wheat under the present condition in society,nature and economy.Furthermore,on the basis of ecologic climate and economic superiority the adjustment suggestion for the present planting structure is proposed.