Abstract: In the experiment, 72 healthy new American-line original breeding pigs with bodyweigt of （64 ＋ 1 ） kg and basically similar day age were selected and randomly divided into 4 groups, including 3 experiment groups and 1 control group. The pigs in control group were fed with basic diet and that in the 3 experiment groups were fed with basic diet ＋ 0.01% salvia tablets, basic diet ＋ 0.03 % chrysin and basic diet ＋ 0.06 % tea eliminating dampness resp., the experiment period was 30 d. The experiment results showed that compared with control group, the daily gains of the 3 experiment groups were enhanced by 5.76 % ,9.52 % and 48.84 % resp., their feed-weight ratios were enhanced by 0.37 % ,3.73 % and 9.33 % resp. and the levels of IgG, IgA and IgM in serum of finishing pigs were enhanced. So, the auto immunity of new American-line original breeding pigs was enhanced.