The results of the current experiment indicated that fermentation could improve the characteristicsofsoybeanmealandfermentedsoybeanmealcouldimprovetheperformance of chicks, increase the level of IgA, IgM and total phosphorus content and decreased the ureanitrogencontentinserum.Therefore,soybeanmealfermentedwithA.oryzae3.042is a promising alternative protein source in broiler feed.