Typical communities and species diversity on the different types of vegetation surrounding the region along the desert-crossing highway in Hangjin County of Inner Mongolia were analyzed by using the method of road inspection and typical investigation.Results showed that there were 16 communities and 37 kinds of plants in the region,which belongs to 14 families and 30 genera,respectively.They mainly included sand plants,salinization plants,and low-wetland plants.Shrub)grass communities were dominant and had a tendency of evolutionin succession,such asSalix psammophila,Hippophaer hamnoides,andTamarix chinensis.