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Driven by the concept of landscaping, this paper analyzed the impact of plant diversity on landscaping function, arrangement methods and community structure by taking plot sampling method as the experimental axis and 3 urban parks in Hefei as the blueprint. Six plots with the size of 20 m x 20 m were selected for investigation. There were 56 species of plants belonging to 50 genera and 42 families in the plots of Zhongshan Road City Park, 48 species of plants belonging to 44 genera and 40 families in the plots of Four Seasons Flower Sea City Park, and 69 species of plants belonging to 57 genera and 45 families in the plots of Xiaoyaojin Park. The survey results show that there are following problems in city parks: lack of plant effectiveness, too homogeneous plant community, disharmony between landscape and environment, poor plant maintenance and lack of attention to ecological maintenance. Based on this, the optimization measures are put forward: increasing evergreen plants to avoid no scenery in autumn, developing plants with excellent landscape effects and a variety of colorful plants, paying attention to the shaping of spatial structure and landscape pattern, regularly taking care of plants and their surrounding environment. It is expected to provide some reference for the construction and development of Hefei city parks, ensure the healthy and stable development of city parks, and provide ideas and methods for the improvement of plant landscaping in city parks. [ABSTRACT FROM AUTHOR]