The long-term site-specific experiment of maize-red adzuki bean rotation in 2015～ 2018 was carried out to explore the effects of increasing planting density with reduced application nitrogen and rhizobium inoculation methods on Nabsorption and yield of adzuki beanplants，and a split -plots design with two planting densities(M1:210 000 plants·hm -2，M2:280 000 plants·hm -2)and three planting patterns(F1:using N 40 kg·hm -2only as basefertilizer，not inoculatedwith rhizobium，F2: starter-N 10 kg·hm-2 plus top-dressing N 10 kg·hm-2，not rhizobium mixed seed，F3: starter-N 10 kg·hm-2 plus top-dressing N 10 kg·hm-2，rhizobium mixed seed)were used.We analyzed the relationship between Naccumulation，translocation and yield of adzuki bean under the condition of increasing density and reduced nitrogenapplication with rhizobium inoculation methods in2018.Our results indicated that applying F3 treatment under the sameplantingdensity，compared toF1，N contents of vegetative organs increased by 4.44%～11.2%(P<0.05)at full seedstage，N accumulation increased by 5.61%～9.28%(P<0.05)at full seed stage and harvest stage，N accumulationincreased by 4.31% tO₂4.5%(P<0.05)during beginning seed stage to full seed stage and full seed stage to harveststage，contribution rate of nitrogen translocation to seed(CNT)decreased by 7.0% to11.1%(P<0.05)，contribution rate ofnitrogen assimilation to seed(CNA)increased by 12.5% to17.1%(P<0.05)，and yield increased by 2.89% to4.60%.Within the same fertilization pattern，when the density increased from 210 000 plants·hm -2 to 280 000 plants·hm-2，nitrogen accumulation after flower podstage，CNA，N accumulation during beginning seed stage to full seed stage and yielddecreased with the increasing of plantingdensity.Overall，the yield of reducing 50% nitrogen and rhizobium mixed seed of adzuki bean under the planting density of 210 000 plants·hm-2was higher than othertreatments.The results provide a theoretical basis for high yield and high efficiency cultivation techniques of adzuki bean under rotation conditions in this area.