Abstract: Taking aged female Wister rats as research objects, the effects of adding different deer fetus preparations in normal drinking on the immune indices of aged female rats were studied. The results showed that adding deer fetus preparations in the diet could significantly increase the content of total protein in the serum of aged female rats and enhance the body immunity of aged female rats. The effect of formula 2（deer fetus powder, ginseng, Codonopsis pilosula and bee pollen） was the best.