Objective: To investigate the anti-tumor effect and its mechanism of Pingxiao Capsules. Methods: The active fraction of Pingxiao Capsules was extracted for anti tumor cells proliferation and inducing tumor cells apoptosis in vitro. After the intragastric administration of Pingxiao Capsules, 4 kinds of nude mice models of human tumor were used to observe the anti-tumor effect and toxicity in vivo. Results: The extract of Pingxiao Capsules could inhibit the proliferation of 10 kinds of human tumor cells to so...