Abstract: According to the shrimp survey data of four seasonal months in the northeast Fujian outer-sea (26°00'~28°00'N,120°00'~125°30'E) in May, August, November of 2008 and February of 2009, this paper studied and analyzed the quantitative distribution and biological characteristics of Trachypenaeus curvirostris. The results showed that the quantitative distribution was obvious different in the seasons and the waters. The population in August was the most and the ratio of catch in total crabs catch was 60.2%, the average density of resource was 614.5 g/h and 144.7 ind/h, while May was the less. The area of high biomass density occurs in the waters at depth of 60 m, the ratio of its catch in total crabs catch was 65.8%, and the average density of resource were 1119.2 g/h and 214.7 ind/h; the body length varied between 47 and 120 mm, the dominant were between 60 and 85 mm, occupying 68.6%; the female was obvious larger than the male with the sex ratio 1:0.42, the average body weight was 6.4 g and 3.2 g respectively;the mature degree of the female was dominated by Ⅱ and Ⅲ stage,accounting for 44.7% and 43.8%;the feeding intensity was middling; the average resources capacity was 684 t.