Abstract: In order to explore the characteristics of netkon changes in the Pearl River Estuary in recent 30 years, this paper analyzes statistically the changes in the community structure of commercial netkon and the correlation between the catch rates of main commercial species based on the netkon survey in the Pearl River Estuary from 1986 to 2016. The results showed that the community structure of commercial fishery resources in the Pearl River Estuary before 2000 and after 2000 were quite different. The number of commercial species before 2000 was significantly higher than that after 2000 (F=6.711, n=1, p=0.017<0.05). The main commercial species before 2000 included Decapterus maruadsi, Saurida filamentosa, Nemipterus virgatus, Scomber japonicus, Pampus argenteus, Pampus cinereus and Cephalopods. Among them, the catch rates of 10 species including Decapterus maruadsi, Saurida filamentosa, Nemipterus virgatus and so on correlated significantly (p<0.05). The main commercial species after 2000 were Metapenaeus joyneri, Palaemon carinicauda, Charybdis japonica, Charybdis truncate, Coilia mystus, Charybdis acuta, Parapenaeopsis hungerfordi and Oratosquilla oratoria. The major catches were correlated significantly (p<0.05). Only four dominant commercial species were common before and after 2000, which shows that the community structure of the commercial netkon had changed significantly.