The purpose was to solve the unreasonable utilization of water and fertilizer resources in silage corn cultivation.The effects of different nutrient input models onyield，economic benefit and environment of silage corn were studied by fieldexperiment.The results showed that the low yield of silage corn under traditional fertilization model(CON)was mainlycaused by the base application of nitrogenfertilizer.The yield of silage corn under the base fertilizer plus topdressing modelbased on soiltest(PAT -1)and the full topdressing model based onspectrum(PAT -2)were 67500 and 73000 kg·hm -2，respectively.Compared withCON，PAT -1 and PAT-2 increased the yield by 12500 and 23500 kg·hm-2，with an increaseof silage corn by 36.4% and47.4%，respectively.Meanwhile，the net income under PAT -1 and PAT-2 model increasedby 103% and 119% as compared with CON，respectively.The nitrogen utilization efficiency was increased by 98.1% and 106.4% in PAT-1 and PAT-2 model as compared withCON.The apparent losses of nitrogen fertilizer in PAT -1 and PAT-2were only 21.8% and 5.6% of that inCON.PAT -1 and PAT-2 model are superior to the CON model in economic benefits andyield of silagemaize，especially for the model of PAT -2.Our result is of great significance for guiding the actual production of silage corn and for achieving an environment-friendly society.