Objective To evaluate the anti-tumour-activity effect of ursolic acid for H22、S180 and 3LL, provide a evidence for clinical application. Methods Use tumour load mouse as transplantable carcinomas animal model. Same sex, weight 18-20g, random divide group after inoculate tumour cell, 10 mouse in every group, the experiment including 5 groups: normal control group, positive group and 3 doses of the new drug were chosen for each pharmacodynamic research then. Give the drug on time for every group, and normal c...