OBJECTIVE： To investigate the inhibition effect of total alkaloid， total phenolic acid and total volatile oil from Ligusticum chuanxiong on the contraction of the isolated uterine smooth muscle of rats， and to provide reference for clarifying the promoting blood circulation to restore menstrual flow traditional efficacy of L. chuanxiong. METHODS： The isolated uterine smooth muscle of rats were collected and soaked in Locke’s solution. Using dimethyl sulfoxide as blank control， verapamil hydrochloride as positive control， the contraction curves of the isolated uterine smooth muscle in rats were recorded with PowerLab electrophysiolograph. Inhibitory effects of total alkaloid， total phenolic acid （mass concentrations of 0.025， 0.05， 0.1 mg/mL） and total volatile oil （0.04， 0.08， 0.16 mg/mL） on the contraction of the isolated uterine smooth muscle of rats induced by oxytocin were evaluated by observing the changes of contraction activity and contraction tension. Inhibitory rates of contraction activity and contraction tension of uterine smooth muscle were calculated. RESULTS： The contraction activity and contraction tension of uterine smooth muscle in rats were increased significantly after treated with oxytocin （P＜0.05 or P＜0.01）. Different concentrations of 3 types of compounds from L. chuanxiong all decreased contraction activity and contraction tension of uterine smooth muscle significantly （P＜0.05 or P＜0.01）. Compared with blank control， except for 0.025 mg/mL total phenolic acid， the inhibitory rates of contraction activity and contraction tension of uterine smooth muscle were all decreased significantly （P＜0.05 or P＜0.01）after treated with other concentration drugs or components. CONCLUSIONS： The total alkaloid， total phenolic acid and total volatile oil from L. chuanxiong show certain inhibitory effect on the contraction of isolated uterine smooth muscle in rats， which provide reference for promoting blood circulation to restore menstrual flow use of L. chuanxiong.