Abstract: Based on the surveys with historical data of Xinghua Bay in spring and autumn of 2012, 2018 and 2019, this paper analyzes the changes of macrobenthic diversity and dominant species and discusses the possible causes of changes before and after the setup of offshore wind farm (OWF) in Xinghua Bay. Results show that from 1985 to 2019, in short time period after the OWF setup, the habitat of macrobenthos has been disturbed to a certain extent. The dominant species were polychaetes, at the same time, species such as Leptomya sp., Gadila dominguensis, Neoxenophthalmus obscurus, Protankyra bidentate and Amphioplus (Lymanella) depressus etc. appeared alternately. With the changing time, the dominant species of macrobenthos in Xinghua Bay tended to be miniaturized as a whole and most polychaetes of strong anti-interference ability dominated the areas rapidly. It shows that macrobenthos can have the ability to recover themselves responding to environmental changes.