By prospecting the highway of Xi'an to Huang ling, in the light of conserving slope, beautifying environment and embelli shing landscape, the present situation and problems of highway greening are discussed.The result shows that the present g reening situation can not meet the necessity of improving environment,maintaining highway and embodying the features of highway department . As far as reservation zone, middle isolate zone, service district and collecting fees station are considered, the authors desig n the highw ay greening all round and sets forth suggestions of highway greening and management