Abstract: Based on the zooplankton investigation in sea area near Dongjiakou Port of Qingdao in March (spring) of 2021 and November (autumn) of 2020, the community structures of zooplankton were analyzed. As result, a total of 33 species and 11 taxa of zooplankton larva, including 18 species and 5 taxa of zooplankton larva in spring and 24 species and 9 taxa of zooplankton larva in autumn, were recorded. The zooplankton average density was 129.4 ind/m³ in spring and 69.4 ind/m³ in autumn, the average biomass (wet weight) in spring was 1 166.5 mg/m³ and 23.8 mg/m³ in autumn, the average Shannon index (H′), Margalef's species richness (d) and Pielou's evenness index (J) were 1.38, 0.95 and 0.90 in spring and 2.61, 1.77 and 0.67 in autumn, respectively. In spring, dominant species were Rathkea octopunctata, Calanus sinicus, Centropages abdominali and Aidanosagitta crassa, while in autumn they were Muggiaea atlantica, Diphyes chamissonis, Oithona similis, Paracalanus parvus, Oikopleura dioica Corycaeus affinis, Polychaeta and Ophiopluteus larva. Cluster analysis showed that the zooplankton in the investigation area can be divided into two groups. This study can provide a reference for the study of zooplankton community structure in the coastal waters of Qingdao.