Abstract: Sample plots were established and investigated at pine forest, Chinese fir forest, deciduous broad leaf forest, mixed forest of pine and broad leaf forest and bamboo forest in Kaihua county, Zhejiang province, for studying relation between forest types and function. The result showed that the canopy density was similar at arbor layers of different forest types, but different at shrub and herb layers. Thicknesses of litter layers were similar among different forest types, but the humus layers were different. The investigation demonstrated that pine forest, mixed forest of pine and broad leaf forest and deciduous broad leaf forest had better effect of water conservation and plant diversity. Propositions were offered such as planting native broad-leaved tree species by thinning, transforming pure coniferous forest to mixed forest of coniferous and broadleaf, and even-aged pure forest to forest with different species and age. In addition, the canopy density of tree layer should be better different with forest types