Thirty full-sib families including six maternal half-sib Acipenser gueldenstaedtii families were built using artificial insemination. The families were spawned on the same day, and a standardized procedure was used to produce the families during larval rearing to eliminate spawning age and common environmental effects on traits to increase precision of the estimate. Fifty individuals of each family were sampled randomly on days 150 and 410, and A. gueldenstaedtii body weight and body length were measured. The variance component and genetic parameters of body weight and body length were estimated with a multi-trait animal model using ASReml soft- ware. The heritability estimates on day 150 were 0.16±0.055 for body length and 0.18±0.058 for body weight. The heritability estimates on day 410 were 0.18±0.070 for body length and 0.094±0.049 for body weight. Heritabilities at different growth stages were low, suggesting that mass family selection is necessary for further selective breeding of A. gueldenstaedtii. The estimates of phenotypic and genetic correlation coefficients between the two traits at different stages were highly positive and were 0.91, 0.85, 0.62, and 0.57, respectively. A difference in the degree of correlation was observed between the two traits. A correlation analysis of genetic parameters would quantify the relationships between growth traits and facilitate planning of a multi-traits breeding program. These results suggest that growth traits of A. gueldenstaedtii could be improved by selecting either body weight or body length. The coefficients of variation for body weight at the two growth stages were 29.09% and 9.46% and both were higher than those for body length, which were 10.16% and 8.43%. These results indicate that the selection potential for body weight was higher than that for body length and provide a theoretical basis for the next A. gueldenstaedtii breeding program.