By analyzing the population composition of Pseudosciaena polyactis in the East China Sea and the change of its partial biological characters, the results show: (1) The yield of P. polyactis has dramatically increased since the 90s, but the average weight, the average body length and the average age are all significantly decreasing, Obviously the resources are more deleterious than before. (2)To make a comparison between the P. polyactis growth equation of the two years (1998 and 1983), the maximum body length-weight and weight growth rate of 1998 are less than those of 1983 execpt for the length growth rate at age 1. And the one age group accounts for 93. 41 % after the calculation from body length to age group. According to the present fishing point being up to tc = 1 and F = 2. 53, the yield per recruitment is less than 70g per fish, which is far behind 150g per fish (tc = 3 and F=0. 7). The averages stock size is 95800 tons during the 1995-1997 based on the application of LCA. It shows that the fishery is under the severe overfishing in growth type now. In order to preserve and recovery the P. polyactis, in this paper some recommending measures such as cutting down fishing boats by 60%, strictly controlling amount of fishing effort and putting off the first catch age to age 3 for the fishery's sustainable development were forword.