Abstract: The effect of Chinese Herbs SiHuang extract on broile small intestines mucosa immunity were observated in this experiment, 204 healthy AA chickens of 1 day old were selected to put into two groups randomly: experimental group and control group, 102 chickens of each group. 200 mg/kg Chinese Herbal SiHuang extract was added to chickens’ basic diet of the experimental group, the trial period lasted 40 days. At the end of experiment, 50 chickens of each group were killed by random and gathering their small intestinal. The effect of Chinese Herbs SiHuang extract on broile small intestines mucosal immune were observated by histology method. The results showed that the experimental group chickens’ duodenum mucosa lymphocyte were obviously increased than the control group, the lymphocyte distributions of jejunum mucosa in experimental group broile were more crowded than that of the control group. There was obviously lymphocyte accumulation phenomenon in the chickens’ ileum mucosa and submucous of the experimental group, and the quantity of lymphocyte was significant incresed than the control group.The results showed that as the feedstuff additives, the Chinese Herbs SiHuang extract had the obvious promoting action to the broile small intestinal mucosa immunity.

Key words: Chinese Herbs SiHuang extract; broil; small intestine; mucosal immune