A field experiment was carried out to explore the effects of the proportion of controlled-release urea and conventional urea on rice yield and its composition under the condition of one-time fertilization，and to evaluate its economic growth benefit for two consecutive years(2018～2019)in typical cropping area of the Dongting lake area.Five treatments were set up，including:no nitrogen(CK)，single optimization of urea fertilizer(CU)，40% 90-day polyurethane coated urea+60% conventional urea(0.4PuCU+0.6CU)，60% 90-day polyurethane coated urea+40% conventional urea(0.6PuCU+0.4CU)，90-day polyurethane coated urea(PuCU).The effects of different mixing ratios of coated urea and conventional urea on the yield，growth and economic benefit of early double-cropping rice were studied.The results showed that different mixing ratios had significant or extremely significant effects on the yield，yield components and economic benefits of early double-cropping rice(P<0.05 or P<0.01).Compared with CU treatment，the yield and economic benefit of 0.4 PuCU+0.6 CU，0.6 PuCU+0.4 CU and PuCU treated early double-cropping rice in 2018 increased by 4.55%～6.19% and 4.69%～6.96%，respectively，and the effective spike number and total kernel number increased by 9.17%～13.17% and 16.43%～23.51%，respectively.The yield and economic benefit of 2019 increased by 19.42%～24.00% and 21.29%～26.90%，respectively；the effective spike number and total kernel number increased by 2.28%～14.61% and 16.00%～36.58%，respectively.Among them，the effects of mixing treatments with different proportions of coated urea were better than that with only coated urea.The proportion of controlled release N in 0.6 PuCU+0.4 CU treatment was higher than that in 0.4PuCU+0.6CU treatment，which increased production and efficiency compared with optimized fertilization treatment.Correlation analysis showed that plant height，effective panicle number，total spikelets number and total kernel number were significantly correlated with grain yield of early double-cropping rice(P<0.05).The mixture of polyurethane coated urea and ordinary urea in one time can effectively improve the yield composition of double-cropping early rice，facilitate the formation of effective panicle number，expand the storage capacity of grains，promote growth，and increase production and income.Among them，0.6PuCU+0.4CU is suitable for nutrient release，and has the best effect for increasing yield and income.