Abstract: Based on the field investigation, the Cerasus community in the valley of Mulinzi Nature Reserve was studied by the mean of phytocoenology. The results showed: ① in the 2 500 m² quadrats, there were 213 vascular plants(including varieties), which belong to 169 genera and 87 families; it was indicated by the analyses of species abundance pattern and Raunkiaer frequency law(A>B>C>D>E)that the species were uneven distribution in the community and the vegetation has the tendency of differentiation and evolutionary. ②The genera of community flora could be divided into 13 distribution types, among which the temperate elements made up 54.86%, while the tropical elements made up 42.36%, and China endemic elements occupied 2.78%. The plant flora had evidently characteristics of transition. ③the vertical structure of cherry community could be divided into tree layer, shrub layer and herb layer, and most of trees distributed in the height of 3～7 m, which mean the community was not so tall; meanwhile, because of the law canopy, most weeds invaded in the community. ④C. subhirtella var. ascendens, C. dielsiana and Rhus chinensis, important values of which were 12.657%, 10.570% and 9.577%, respectively, were the dominant populations in the tree layer. Rhododendron ovatum, Weigela japonica var. sinica and Indocalamus latifolius were the dominant populations in the shrub layer, which important values were 7.890%, 7.465% and 6.805%, respectively. ⑤The analysis of structure diagrams of standing trees indicated that C. subhirtella var. ascendens, C. dielsiana, Cryptomeria japonica and Morus cathayana were declining in the community, while Quercus serrata var. brevipetiolata, Broussonetia papyrifera and Lindera glauca were inverse. As one kind of unstable secondary forest, the best way to protect the resource of cherry is to exploit and introduce artificially.