Using wuxiangjing 14 as a material,effects about precise-using N and normal using N to the rice yield and N using efficiency were studied.The result showed that the panicles of precise-using N were remarkable fewer than the panicles of normal using N,the rice yield of precise-using N was unremarkable higher than that of normal-using N.The N using efficiency of precise-using N was more than that of normal-using N by 8.8%.