Abstract:A field plot experiment was carried to study effect of organic fertilizers on yield and quality of rice grains and nitrogen use efficiency.The results showed that, the rice yield is much higher under the facility treatments of 20% pig manure and 10% pig manure decomposed organic fertilizer and 20% biogas fertilizer instead of pure fertilizer treatments. Compared with CK treatments the rice yield respectively increased by 103.49%, 81.62% and 74.64% under the three treatments and increased by 38.67%, 23.77% and 19.02% than the pure fertilizer treatments. The 20% pig manure decomposed organic fertilizer instead of 20% nitrogen fertilizer had the highest Nitrogen use efficiency of 32.64% which was 2.66% higher than pure chemical fertilizer. The 20% pig manure and 10% pig manure organic fertilizer decomposed were both higher than the pure fertilizer treatments with the growth of 1.12% and 1.04%. According to the results, we can see that organic fertilizer can increase the rice yield and nitrogen fertilizer use efficiency. Compared with pure fertilizer treatment , 10% of the straw instead of 10% chemical fertilizer treatment, 20% of the pig manure to replace 20% of chemical fertilizer treatment, 10% of the pig manure organic fertilizer instead of 10% chemical fertilizer treatment, 30% of the pig manure organic fertilizer instead of 30% of chemical nitrogen fertilizer treatment and 20% biogas treatment instead of 20% chemical nitrogen fertilizer treatment can improve the rice gel consistency , 10% of the straw instead of 10% chemical fertilizer treatment had a lower amylase content. The results showed that organic fertilizers could improve the appearance of rice quality and cooking quality.