Vegetation cover is of the important ecological function of water and soil resource conservation.In mountainous region of Yunnan Plateau,roadside vegetation community condition and its succession have special significant of the direct and indirect impact on the highway environment security and water and soil conservation.Kunming-Shilin highway was selected as a study case.Helped with RS and GPS technique,field investigation on the vegetation community condition was completed along this highway.The data of 36 samples was obtained.By use ecology analysis method,the characters of vegetation population composition,constructure level and succession direction were studied and developed.Based on the primary analysis result,some proposals on vegetation conservation along this highway were brought forward.