This paper summarizes the recent 6～7 year advances in the research of pharmacological effects of polyactin including mainly six aspects: ①Effects of polyactin on functions of macrophages in vitro ; ② Mechanism enhancive effect ofpolyactin on NK cell activity; ③Effects of polyactin on the human lymphocyte immunofunction; ④Effects of polyactin on the proliferation and cytotoxicity of LAK; ⑤Enhances in specific antitumor activity in mice in vivo ; ⑥Effects of polyactin on erythrocyte deformability and immunofunction in Rabbit and Rat.