The aim of this study was to investigate the effects of β-conglycinin on the growth performance, immunity function, antioxidant capacity and the related gene expression of anti-oxidation and inflammation in Rhynchocypris lagowski Dybowski. Five diets containing (0, 20, 40, 60 and 80 g/kg, respectively) β-conglycinin were used to feed R. lagowski Dybowski for 56 days. These results shown that compared with the control, FW, WG, SGR, FE and PE were significantly decreased by feeding (40 ~ 80 g/ kg) β-conglycinin (p < .05); feeding (40 ~ 80 g/kg) dietary β-conglycinin caused the activities of LZM and AKP in serum, CAT in proximal intestines and hepatopancreas, GPx in intestines and hepatopancreas and T-SOD in intestines to get significantly decreased and the content of MDA in intestines and hepatopancreas to get significantly increased (p < .05); significant increase of the content of IgM in serum and significant decrease of the activities of T-SOD in hepatopancreas and the content of C3 and C4 in serum in groups with (60 ~ 80 g/kg) dietary β-conglycinin were observed (p < .05); the expressions of Nrf2, HO-1, CAT, GPx, TGF-β and IL-10 were significantly reduced, and the expressions of Keap1 and TNF-α were significantly increased by feeding (20 ~ 80 g/kg) dietary β-conglycinin in intestines and hepatopancreas (p < .05); and the expressions of IL-1β in distal intestines and hepatopancreas were significantly increased by feeding (20 ~ 80 g/kg) dietary β-conglycinin, and the expressions of IL-1β in proximal and mid-intestines were significantly increased by feeding (40 ~ 80 g/ kg) dietary β-conglycinin (p < .05). In conclusion, under the conditions of our study, more than 20 g/kg dietary β-conglycinin could affect the gene expressions of antioxidation and inflammation in R. lagowski Dybowski, and more than 40 g/kg dietary β-conglycinin could reduce the immune function and antioxidant capacity and lead to a decline in growth performance in R. lagowski Dybowski.