Abstract: [Objective] To observe the effects of Compound E. ulmoides with different concentration on the development of immune organs of broilers and ND-HI valence. [Methods] 400 AA broilers were divided into four groups at random. Group I, II, III and IV were fed on Compound E. ulmoides at 0, 1.25, 2.5 and 5g/L. At each weekend, eight AA broilers in each group were weighed, took blood and slaughtered randomly. Then thymus, spleen, bursa of Fabriocius were collected and weighed in order to observe its effect on thymus index, spleen index, bursa of Fabriocius index of broilers. [Results] Thymus index and bursa of Fabriocius index had no differences with groups at the first six weeks. The Spleen index of broilers in group II was significantly higher than that in group I (P <0.05) at fourteen days old and obviously higher than any other group at twenty-one days old (P <0.05). Among which group II and III had highly significant differences (P <0.01). At forty-two-day old, the spleen index of groups II and III were all significantly lower than that in group I (P <0.05) while group IV was extremely lower than that in Group I (P <0.01); ND-HI antibody level of broilers in groups III and IV were significantly higher than that in group I (P <0.05) at twenty-one days old. They reached the highest level at twenty-eight days old, ND-HI antibody level in groups II and III were significant higher than that in group I (P﹤0.05) and group IV was higher than that in group I highly significantly (P﹤0.01). [Conclusion] The Compound E. ulmoides Aqueous Extract of different concentration had certain effect on the spleen index of broilers at the first three weeks, and the group with lowest concentration had the best effect. The Compound E. ulmoides Aqueous Extract could increase the effect of ND-HI valence. They presented a kind of relationship that the more the compound E. ulmoides Aqueous Extracts were given; the stronger the effect of the ND-HI valence appeared.