stimulate index of lymphocyte cell was raised after X intervention compared with those of the model group (P<0.05). The content of IL-2 in the serum was enhanced after intervention of active fraction C and X of Angelica Sinensis Radix compared with those of the model group (P<0.05，P<0.01). Conclusion Active fraction of Angelica Sinensis Radix shows increasing immunological function of mice exposed to hypoxia.

    Key words：active fraction of Angelica Sinensis Radix;high altitude hypoxia;immunological function;IL-2;mice

    青藏两地属于高海拔地区 ......