Abstract: 120 one-day-old Ross 308 commercial broilers were randomly divided into 4 groups, with three repetitions in every group and 10 broilers in every repetition. The broilers in control group were fed with the basic diet and that in test group AWEⅠ, AWEⅡand AWEⅢwere fed with the diet with adding 100, 300 and 500 mg/kg ethanol extracts from Allium mongolicum. The effects on the production performance of broilers were studied. The results showed that ethanol extracts from A. mongolicum had no significant effects on the production performance of broilers （P〉0.05）, but it had the functions of increasing daily weight gain, enhancing feed intake and decreasing the feed-meat ratio.