The field experiments with 3414 design were conducted on fluvoaquic soil and loessial soil area in Guanzhong west and effect was analyzed by main factors and single factors to evaluate the relation between NPK dosage and yield of maize,put forward the nutrient of maize on abundance index and best fertilizer rates.The results showed that the nitrogen fertilizer on maize yield increasing rate was 156%～622%;The phosphorous fertilizer was 112%～267%;And the potassium fertilizer was 23%～343%.Influence of NPK fertilizers on maize yield was differenc on different area.The optimum fertilizer amount N,P2O5,K2O on the maize confirmed through the mode and fertilizer price was 1298～1678,506～718,294～60 kg/hm2 in higher fertility soil;1636～1862,742～949,59～977 kg/hm2 in medium fertility soil;1828～2034,943～118,92～1069 kg/hm2 in lower fertility soil；200～2254,1059～1355,1071~1375 kg/hm2 in very low fertility soil。 optimum fertilizer amount；maize