Abstract: A field survey of cultivated plants had carried out in Hengshui Lake，and the species composition，spatial pattern，similarity and suitability of landscape plants were analyzed by GIS10.0，Sorenson index and suitability index. The results showed that there were many species of landscape plants with a high proportion of single family and genera in Hengshui Lake，resulting in the significant change on the species composition of plant in this region. The geographical composition of landscape plants was complex，and the flora characters were primarily of the temperate types，especially north temperate type. Typical garden ornamental plants such as shrubs，trees and perennial herbs were mainly used，while the species of hygrophyte were few. There are obvious differences in the richness and species composition of landscape plant among areas under different human activities，among which the parks on the east and south sides of Hengshui Lake had the most abundant plant species. Moreover，the suitability of habitat of waterbirds formed by landscape plants was very low，due to the use of a large number of alien species. In the future，the afforestation in Hengshui Lake should give priority to the suitability of wetland ecosystem and the demand of wildlife for habitat.

Key words: Hengshui Lake, landscape plant, species composition, spatial pattern, suitability