The age structure and growth characteristics of 362 Triplophysa yaopeizhii speciments collected from the Anning River in Xichang were studied using otoliths for age determination. The main results were as follows： the body length of T. yaopeizhii ranged from 4.1 to 10.7 cm， and the body weight ranged from 0.7 to 14.2 g. The age of the speciments ranged from 2 to 9 years， with 5~6 years being the dominant age group， accounting for about 42.27% of the total samples. The relationship between body length and body weight was described by the equation W=0.0126L^2.9606 （R²=0.961 9， n=362）， indicating isometric growth characteristics. There was no significant difference in age， body length， or body weight between the female and male groups （P>0.05）. The von Bertalanffy growth equation was used to fit the growth equation of body length and body weight as follows： L_t=10.415［1-e^{-0.155（t+1.750）}］，W_t=12.981［1-e^{-0.155（t+1.750）}］^2.9606. The inflection point occurred at 5.248 years of age， with a corresponding body length L_i=6.895 cm and body weight W_i=3.827 g. The apparent growth index φ was 1.295. These findings indicate that the growth of T. yaopeizhii is slow and characterized by a long cycle. These results provide a foundational basis for the artificial breeding， stock enhancement， and resource conservation of T. yaopeizhii in the Jinsha River basin.