Abstract: Gomisin D,schisantherin B,schisanhenol,gomisin J,gomisin N,gomisin G,schisandrin B,schisandrin C,(+)-anwulignan,schisantherin A,deoxyschisandrin,schisandrol A and gomisin A were isolated from stems of Schisandra chinensis by silica gel chromatography,high performance liquid chromatography (HPLC).Insecticidal activities of lignans in stems of S.chinensis against Myzus persicae and Plutella xylostella were determined by worm impregnation method.The results showed that insecticidal effect of schisandrol A against M.persicae at 48 h was 82.1% at the concentration of 2g/L.Insecticidal effect of schisandrin B against P.xylostella at 72 h was 100%.LC50 value of schisandrin B against P.xylostella was 586.22 mg/L,significantly lower than the insecticidal effect of chlorpyrifos (211.16 mg/L).The LC50 value of schisandrol A against M.persicae at 72 h was 295.62 mg/L,significantly lower than the insecticidal effect of veratrine with 35.29 mg/L.

Key words: Schisandra chinensis, lignans, insecticidal activity