Abstract: Twenty one sample plots of plant community landscape in Guanshan Lake Park were selected as the research objects, and their color characteristics were analyzed quantitatively. The results show that the leaf color of plant community in Guanshan Lake Park is mainly bright green, and the color leaves and flower plants are mainly purple, red and white; the proportion of bright green, light green, white, yellow and red is decreasing from late spring to early autumn, while that of brown green, yellow green and purple is ascending, the 'valley type' curve of brown decrease first and then increase, the 'peak type' curve of orange, pink and blue first increase and then decrease; the color meeting period of space plant community in flat area, node and road is concentrated in spring and summer, while that of space plant community in hard water bank is concentrated in summer, and the seasonal landscape of the park in autumn is relatively lacking; the color composition types of plant community is composite polychromatic type > contrast bichromatic type > single color type; high quality plant community landscape is mainly composed of main body + selection + embellishment color block, showing 4–5 kinds of colors, with adjacent complementary colors as the color blending type, and the main color proportion is controlled at 2∶3.