862 species of Paracanthobrama guichenoti were collected and examined from Wanghu Lake during April 1994 to May 1995.The scales were used to determine the age and growth of the fish.The chief ring feature of the fish has the cut and fragment type on the scales.The annuli are formed annually and the time of annulus formation occurs mainly in May to July.The relationship between of the body length (L, cm) and scale radius (R, mm) is expressed as L=5.6784+4.3056R,and of body length and weight (W,g) is W=8026×10^-2L^2.8754. The growth type between body length or body weight and age of P.guichenoti may be described by the von Bertlaffy equation separately as L_t=25.0143[l-e^{-4668(t+1.2886)}] W_t=277.8876[1-e^{-4668(t+1.2886)}]^2.8754 The inflexion point t_i is one year, and at the point the body weight is 82.82 g, and body length is 16.42 cm.In fact, the age of rational fishing in Wanghu Lake should be two years, the theoretical length of 19.63 cm and the weight of 138.34 g.