Abstract: A comparison test on nitrogen, phosphorus and potassium fertilizer-utilizing rates in late rice between optimum fertilization and conventional fertilization was carried out, the results showed that yield of optimum fertilization increased by 7.1% than that of conventional fertilizer, the effect of nitrogen fertilizer application was the most obvious, the fertilizer-utilizing rates of nitrogen, phosphorus and potassium fertilizer in the treatment of optimum fertilization increased by 5.37, 6.66 and 6.3 percentage points respectively.