Abstract: For the purpose of the application of controlled release nitrogen the best dosage. Under field condition, set six treatments, T1 no fertilizer, T2 conventional fertilization (basal dressing), T3 conventional urea (basal dressing + topdressing), T4 controlled release urea 100%, T5 controlled release urea 90%, T6 controlled release urea 80%. A study on the effects of controlled release nitrogen fertilizer on growth and yield and benefit of corn, the results showed that controlled release nitrogen treatment to improve the corn plant height, the ground of biomass. From jointing to maturity, the dry matter weight of controlled release urea treatment T4, T5 higher than common urea treatment, and the largest T5. Controlled release nitrogen fertilizer reasonable dosage increased corn stem diameter, grain number per panicle, reduce the corn bald tip length, so as to improve production, and the highest yield T5 processing, 8637.6 kg/hm2, and nitrogen production increased by 16.7%, compared with conventional fertilization (basal dressing) production increased by 9.5%, the difference compared to significant level. From the output and economic benefit analysis, T5 processing was an ideal choice fertilizer use.