This paper deals with the growth and stock assessment of Capias auratns aurtus L.collected from Wanghu Lake during December 1984 to May 1986.The relation between the body weight and body length can be expressed in terms of the power function equation: W=4.2184×10^-5 L^22,9274.The growth equation is L_t285.82[1-e^{-0.2640(t+0.1213)}] and W_i=653.30[1-e^{-0.2640(t+0.1213)}]^2.9274.The coordination of inflexion point is at l_t=3.95Y and W_i=192.41 g.Using Jones length-based cohort analysis, the standing srock size and biomass were estimated to be 1.0905×10⁶ in number and 53355kg respectively.The theoretical abundance and yield were also calculated under different fishing intensities in accordance with Thompson-Bell predictive.In order to maintain a sustaining fisheries, a discussion on the rational exploitation of the stock has been proposed.