Abstract: Investigations were carried out on species composition and structure characteristics of two sample plots of mixed forest of Castanopsis sclerophylla and Liquidambar formosana and Phyllostachys heterocycla ‘Pubescens’ stand with Ardisia violacea in Baiquan town, Zhoushan Island of Zhejiang province in October 2014 and September 2016. The result demonstrated that there were 70 species belonging to 56 genera and 37 families. Among them, there were 13 arbors, 30 shrubs, 13 herbs, 13 lianas, 1 bamboo and 53 woody plants. The vertical structure of the two communities could be divided into arbor, shrub layer and herb layer, with evident dominant species at each layer. The dominant species of Ph. heterocycla ‘Pubescens’ stand was Ph. heterocycla ‘Pubescens’ at tree layer, Maesa japonica at shrub layer and Dryopteris championii, Carex sp. and Ainsliaea fragrans at herb layer. In mixed forest of C. sclerophylla and L. formosana, the dominant species at tree layer was C. sclerophylla and L. formosana, that at shrub layer was C. sclerophylla, Eurya japonica and A. violacea, and that at herb layer was Cyclosorus acuminatus and Woodwardia japonica. The investigation indicated that A. violacea was clustered distribution in the two investigated communities, and had an obvious dominance.