Abstract: Index of recommending fertilizer are summarized in this investigation．and an index system of precise applying fertilizer is formed according to the studies of several years in high yield region of Taihang Piedmont，the major indexes include the soil available nutrition and nutrient content in crops，which form the spine for base fertilizer and added fertilizer that could be regulated according to the nitrite content in special site of plant in key stage of winter wheat and summer maize，other indexes such as the degree of nutrient requirement of different crops，the target yield，the plant manifest，the water content and the fertilizer mode etc．would provide auxilinary indexes for precision fertilizer．