Abstract:This article surveys the effects of alcoholic extract of Ziziphus spinosa on the immune function of mice. It was found that oral dosing of the seeds of Ziziphus spinosa(5g/kg. d×20) increased the appetite and weight of mice and strengthened the immune function of their cells and body fluid. The delayed hypersensitivity induced by cyclophosphamide was inhibited in the group administered with Ziziphus spinosa. The result suggests that the seeds of Ziziphus spinosa can improve the immune function of mice.