Abstract: Take new hybrid rice Taifengyou 676 as a test material, the effect of different N fertilization amounts on the rice yield and yield components was analyzed, the result showed that N fertilization had significant effect on the number of effective spikes per 667 m², number of grains per spike and seed setting rate at the medium-fertility field. The number of effective spikes per 667 m² and grains per spike, seed setting rate and 1000 grain weight per panicle in the treatment of 12 kg N application per 667 m² were even and coordinate, and the yield was the highest.