Twelve dominate landscape plants,Galium odoratum,Canna indica,Iris tectorum,Paeonia lactiflora,Ligustrum lucidum,Osmanthus fragrans,Cinnamomum camphora,Magnolia grandiflora,Photinia serrulata,Nerium oleander,Euonymus japonicus,Lonicera japonica and Viburnum odoratissimum in Xi’an,Northern China.However,the distribution of soil nutrients in the rhizosphere and nonrhizosphere areas and ecological stoichiometry of landscape plants in this region have been largely unknown,This paper discusses the rhizosphere effects and ecological stoichiometry of twelve landscape plants in Xi’an.The results were as follows:(1)the content of soil C,N,and P in rhizosphere were higher than that of nonrhizosphere,while pH was lower than that of nonrhizosphere.The soil C,N,and P of different landscape plants showed significant enrichment and pH showed significant loss.(2)The content of soil C,N,and P presented the obvious “surfaceaggregation”,which gradually declined with the increasing soil depth.(3)The content of soil C,N,and P in the same organs showed arbors>shrubs>herbs,and in the same landscape plants showed leaf>stem>root,which suggested that the landscape plants had its own absorption migration,accumulation characteristics.(4)As to soil stoichiometric,soil C/N showed arbors>shrubs>herbs,and had no significantly difference (P>0.05),soil C/P and N/P showed herbs>arbors>shrubs,the lower C/P and N/P preliminary showed the landscape plants more easily restricted by N and P in the soil under the natural conditions;As to plant stoichiometric,leaf C/N showed shrubs>herbs>arbors,C/P,N/P showed herbs>shrubs>arbors,and had no significantly difference (P>0.05).(5)Correlation analysis showed that the leaf C,N，C/N,N/P had significant correlation with soil C,N，C/N,N/P (P<0.05),which illustrated the demand for nutrition elements of the landscape plants basically consistent with soil nutrients,while the content of soil P had no effect with plant leaves P.