urea and coated urea mixed fertilizer could increase the yield of rice,and the yield of rice was the highest when mixture of 50% common urea and 50% coated urea was applied. The yield of rice increase was mainly due to increasing of number of ears per mu. While 50% common urea mixed with 50% coated urea,the Nitrogen use efficiency was the highest. When coated urea mixed with common urea,nutrient balanced released in the early and middle growth period,which guarantee nutrient supply in the most important early and middle growth of rice.So the Nitrogen use efficiency improved and the yield of rice increased。