Objective:To study influence of Blackcurrant Polysaccharides on the immune function in mice of hypoimmunity.Methods:Immune suppression was induced by cyclophosphamide in mice.Then the mice were treated with oral Blackcurrant Polysaccharides at 0.4,0.8,1.6 g/kg daily for 10 days.The phagocytosis ability of macrophage,IL-2 and the HC50 were observed.Results:There were statistical differences in the thymus index,the spleen index,IL-2 and the HC50 among the high,middle and low dose groups.And there was statistical difference in the phagocytosis ability of macrophage in the high and middle dose groups.The content of hemolytic OD was statistically different between the high dose group and the control group.Conclusion:Blackcurrant Polysaccharides have immune function.