In order to investigate the relationship between vegetation diversity and soil factors,a vegetation survey was made on the highway side slopes in the tourism segment and near rivulet in Yanqing County.There were 39 families and 120 species of plants in the sections,of which there were 18 species of arbor,17 species of shrub,and 85 species of herb.By the ecological dominance index in the community,the layers of plants were in the order of tree layershrub layerherbage layer.In the sections,the vegetation ecological dominance index of Gulong Road was the greatest.The diversity and richness of herb layer were greater than canopy layer and bush layer.The vegetation diversity and richness on Luanchi road were greater than those on Songyan Road and Gulong Road.The relationship between vegetation diversity and soil factors was analyzed by applying grey incidence analysis.Results indicated that the relation degree between vegetation diversity and soil pH value was the biggest,the relation degree between vegetation diversity and available K was the second,and the relation degree between vegetation diversity and soil bulk density was the third.The total nitrogen was one of the plant diversity restricting factors on Guyaju road completely covered by nature plants.