Abstract:To study the growth characters of bighead carp (Aristichthys nobilis) in Wudalianchi Lake, 223 individuals were sampled in 2013 and 2014 respectively. Age was determined through the scale annuli and body length and body weight were back-calculated (Table 2). Von Bertalanffy growth equation were fitted to analyses the growth of body length and body weight. Calculation of increment rate and growth indexes of body length of Aristichthys nobilis by Yin Mingcheng′s methods (1995).Statistic analysis of all data were taken by Microsoft excel 2003 and SPSS 19. Results showed the mean body length and body weight of the sample were 54.61cm and 3280.53g respectively. Age of the fishes was identified to six age classes (3+﹣8+ years old) and individuals of 5+ years old was dominated with frequency of 50.67% (Table 1).The relationship between body length and body weight could be expressed as: (n=223, R=0.974)(Fig. 1). The VBGF growth formula of Aristichthys nobilis in Wudalianchi Lake as follows: ; (Fig.2). Growth rate and acceleration growth rate equation of body length were and , respectively (Fig.3). Meanwhile the growth rate and acceleration growth rate equation of body weight were and ,respectively (Fig. 4). Growth rate curve of body length has no inflexion(Fig. 4), i.e. growth rate of body length declined as age increased. Growth rate curve of body weight has an inflexion, and the age, body length and body weight corresponding to the inflexion are 7.61, 63.94cm and 5012.82g respectively. The growth parameter ? of Aristichthys nobilis were compared between different areas. Compared with the populations in other waters, the population in Wudalianchi Lake growed slowly (Table 4). The growth of Aristichthys nobilis should be mainly affected by both biotic and abiotic factors such as water temperature, food organism density. The key measure to effectively improve the growth rate of Aristichthys nobilis is to reduce stocking density.