A report on the inhibitory effect of the extract CS-Ⅱ of Dongchongxiacao on mice bearing Ehrlich Ascitic Cancer is presented. Mice inoculated with 5×10~5 cancer cells intraperitoneally were treated 24 hours later with CS-Ⅱ, the daily dosage being 0.355 g/kg, 0.71 g/kg and 1.42g/kg in a period of 15 days. It was found that the prolonged survival time was 55.4%, 97.4% and 126.6% respectively as compared with the control. The non-incidence rate was 40%, 70% and 70% for the treated group but 0% in the control g...