Abstract: An biofouling investigation were conducted in the outlet of Seawater Flue Gas Desulphurization (SFGD) from a coalcombusion power plant in Zhanjiang Bay from February 2016 to March 2017. A total of 38 species were recorded. The dominant species were Amphibalanus reticalatus, Stenothoe valida, Perna viridis, Caprella penantisetc. The settlements of marine fouling organisms occurred throughout the year particularly in spring and autumn, indicating an obvious seasonal variation in species and biomass. The Shannon-Wiener Diversity Index and the Margalef Richness Index were the highest in spring. According to the Pearson correlation analysis the biomass was significantly and negatively related to salinity and positively related to suspended solids with coefficients of -0.694 and 0.701, respectively. According to the result of ABC curve analysis, the community structure of fouling organisms was instable on the plates exposed in summer, autumn, the first-half and the last-half year. The community structure was rather stable in spring and on the year plates. However，the stability suffered a heavy interference in winter.