Abstract: In order to promote high and stable crop yield, two modes of straw returning（S） and non-returning that with straw removing（N） were set, there were 8 treatments of nitrogen fertilizer, 0（no nitrogen fertilizer）,CK(conventional nitrogen fertilizer, 75 kg·ha^-1 nitrogen fertilizer, 120 kg·ha^-1 phosphorus fertilizer and 55 kg·ha^-1 potassium fertilizer were applied as thebase fertilizer at sowing time, 150 kg·ha^-1 nitrogen fertilizer was applied as the top fertilizer at jointing stage of spring maize),+10%,+20%,+30%（conventional nitrogen fertilizer added 10%,20%,30% respectively）,-10%,-20%,-30%（conventional nitrogen fertilizer reduced 10%,20%,30% respectively）, explore the effects of different nitrogen fertilizer treatments on maize yield and economic benefits under straw returning. The results showed that without nitrogen fertilizer treatment, the maize yield of straw removal mode was higher than that of straw returning mode, increased by 18.35%. Under nitrogen fertilizer treatment, the maize yield of straw moval mode was higher than that of straw moval mode, increased by 0.22%-7.94%. Under the straw returning mode, the benefit of +10% nitrogen fertilizer treatment was higher than other treatments, increasing at least 486.41 yuan· ha^-1. In the production, farmers can use straw returning and increase nitrogen fertilizer to improve the maize yield, so as to obtain better economic benefits.