Objective To probe into the mechanisms of Huanshaodan in delaying aging by observing its effect on immunological function of aging mice induced by D-galactose.Methods Mice were randomly divided into four groups:control group,model group,low-dose and high-dose Huanshaodan group.The model mice were established by D-galactose subcutaneous injection.Meanwhile,Huanshaodan was administered to the treatment groups,control group and model group were given NS.After 6 weeks,the index of spleen and thymus,the spleen level of interleukin-2(IL-2) and T l...