In order to study the structure feature of zooplankton community and the status of water quality of five water reservoirs in Zhejiang, the paper conducted preliminary surveys on species distribution, dominated species, density, biomass and species diversity of five reservoirs in August (high water level period) and December (low water level period) of 2014. It identified a total of 53 species which include 14 kinds of protozoa, 18 kinds of rotifera, 9 kinds of cladocera and 12 kinds of copepoda.The primary dominant species in each reservoir is thermocyclopstaihokuensis.The annual average density of zooplankton is 1088.85 ind./L, while the biomass is 1.1mg/L.The density and biomass in wet period are 1869.49 ind./L and 1.85mg/L respectively which are higher than that（308.22 ind./L和0.35 mg/L）in drought period. Shannon-wiener index, Margalef index and Pielou index were applied to evaluate the water quality of five reservoirs.The results showed that the status of water quality is from clean to light pollution.The water quality in wet period is better than that in drought period.