The Yellow River wetland plays an important role in the ecosystem of Lanzhou City.The plantdiversities of Lanzhou urban wetland was studied by the field investigation of three habitats in the YellowRiver wetland using belt transects and quadrats.Results show that:（1）Herb,particularly Salix babvlonicathat belongs to Salicaceae,is the dominant species in various wetland plant communities,while only one species of one family shrub is found.Wetland plant species in transition zone nearly cover all the species in otherhabitat systems.（2）The importance values for Leymus secalinus,Echinochloa crusgalli and Chloris virgataare 16.336,14.112and 11.723,respectively.Phragmites communis has been strengthened in transition zoneand its importance value in nearly natural wetland is 13.153.Common companions,such as Oenanthe clecumbens,Typha angustifolia and Beckmannia syzigachne,also have certain positions in wet environment.（3）Simpson and Shannon-Wiener indexes of wetlands′habitat follow the order of transition zone>nearlybare wetlands>nearly natural wetland,and however,evenness index does not have such a trend.βdiversityfor nearly bare wetland and transition zone is lower than that of nearly natural wetland and transition zone,which is consistent with the sequence of species dissimilarity among different habitats.