Objective To investigate the effect of rich selenium-Banqiao-Codonopsis Pilosula( RSBCP) mixture on the immune functions of the aging mice. Methods Sixty Kunming mice( half male and half female) were randomly divided into high-,middle-and low-dose RSBCP mixture groups,model group and control group,with twelve mice in each group. The control group was injected intraperitoneally with 500 mg /( kg·d) normal saline and the other groups were injected with the same amount of D-galactose. The RSBCP mixture high-,m...