Abstract: Seasonal variations of net macrozooplankton community characteristics and its relationship with environmental factors of the sea area around Xiaoheishan island were investigated in the present study.Xiaoheishan island lies in the middle of the Miaodao Archipelago.It lies on the dividing line of the Yellow Sea and the Bohai Sea in China.From 2013 to 2015, 8 periods were included in this survey.A total of 36 species of zooplankton were identified.Among these species 13 species belong to copepods.The abundance of zooplankton ranged from 1.5 to 287.5 ind/m³, with an average of 68.4 ind/m³; the biomass ranged from 0.3 to 346.9 mg/m³, with an average of 51.9 mg/m³.the Shannon diversity index (H') ranged from 0.64 to 2.15, with an average of 1.22; the Pielou evenness index (J') ranged from 0.41 to 1.00, with an average of 0.76.The main dominant species in the sea area around Xiaoheishan island were Calanus sinicus and Aidanosagitta crassa etc.The results of the canonical correspondence analysis(CCA) applied to the environmental factors indicated that water temperature(WT), transparency (Tra) and salinity(Sal) significantly influenced the zooplankton community.And we also find out that Aidanosagitta crassa may has an important effect on the copepod in winter.