Abstract: Taking Xiamen city green space as a example, through the surveys and statistics Xiamen urban green space in the ornamental grasses resource types, the results showed there were mainly 44 ornamental grasses are used in Xiamen city green space. In the garden application and morphological point of view, these different ornamental plant divided into two categories by height (>180 cm), medium-high (90-180 cm) ornamental grasses; dwarf type (60-90 cm), low type (<60 cm) ornamental grasses. analyzed and summarized in these two types of ornamental grass green space in the application mode, the application landscape forms and ideas, According to the principles of landscape and morphology, this paper analyzed and summarized the application of ornamental grasses in order to providing reference for further uses of ornamental grasses.