An analysis was conducted on the lake anchovy Coilia ectenes tail-huensis (yen et Lin) gathered with a total of 3964 fish from April 1982 fo April1984, to study the characteristics of growth, mortality and feeding bebit in differentbody length. The result shows that its natoral mortality coefficient (M) was 0 .52;itsfishing mortality coefficient (F) was 2.66, and the total mortality coefficient was3.18. The turning point of growth was at 2.548. When the fish wan 131 mm inlength, small fish and shrimp were found in its stomach contents. At the length of170 mm, the ratio of fish in stomach contens increased as much as 50--100%. Thesaturation subcoefficient of fish could account for 85--99% of the total saturationcoefficient, among which the white shrimp was about 40--94%. According to Scha-efer and Beverton-Holt models, if mainiaining the present fishing method andcatehability. the equilibrium sustainable yield of the lake anchovy in Taihu Lakewould be 13,050,000 jin and the optimal fishing effort would be 3,190,000 jin/day. However, the integrated analysis indicates that the optimum age for the first catchshould be 1.5 years old rather than 0.5 year old, thus the yield would increase threetimes, even though F value remains no change.