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In order to improve the yield of peanut, the effect of nitrogen application on agronomic characters and yield of peanut was studied. In this study, Yuanza 9102, Kainong 176, Zhuhua 2 and Yuhua 23 were selected as test materials and three different levels of nitrogen fertilizer treatments were used, no nitrogen (0), medium nitrogen (150 kg / hm 2 ) and high nitrogen (300 kg / hm ² ). Split-plot experiment was conducted to study the effects of different nitrogen fertilizer treatments on the agronomic characters and yield of peanut. The results showed that the agronomic characters of medium nitrogen application were significantly higher than those of the control and high nitrogen application. With the gradual maturity of peanut pods, medium nitrogen application was significantly higher than that of the control and high nitrogen application in terms of full fruit rate,100 kernel weight and yield. Taken together, medium nitrogen(150 kg / hm ² ) performed the best. [ABSTRACT FROM AUTHOR]