Abstract: Based on the monitoring data of QIONG WEN CHANG NO.3180 from August 2005 to May 2010, we analyzed the fishing grounds, fishing season and dominant species of large-scale light falling-net fisheries in South China Sea. Results show that the dominant species are Sthenoteuthis oualaniensis, Carangidae, Trichiurus japonicus, Loligo and Auxis, which account for 40.94%, 21.92%, 13.56%, 10.17% and 6.21% of the total, respectively. We divide the fishing grounds into three areas: area Ⅰ, which is located in deep waters close to Xisha Zhongsha Islands; area Ⅱ, located in continental shelf waters outside Pearl River estuary; and area Ⅲ, located in continental shelf waters in Beibu Gulf. Dominant species of area Ⅰ is S.oualaniensi, which account for 91.10% of total landings, and the second most species is large tunas (Thunnus albacares, T.obesus), making up 0.83%. Dominant species of area IIⅡare Carangidae, Loligo and T.japonicus, which account for 42.88%, 20.34% and 14.52%, respectively. Dominant species of area Ⅲ are T.japonicus, Carangidae and Loligo, which account for 45.06%, 22.16% and 14.58%, respectively. The fishing vessels operate mainly in area Ⅰ from March to May, in area Ⅱ from August to September and December to February, and in area Ⅲ from October to November. Besides, annual fishing days in area Ⅰ vary dramatically. It is suggested that Fishing Closed Season for falling-net fishing in area Ⅰ should be adjusted.