Objective To investigate the growth of tumors and the natural life length of the rats after the adriamycinethylcellulose microspheres(ADM-EC mc) were injected in the rats bearing transplantable liver cancer through their hepatic arteries.Methods ADM-EC mc were infused into the proper hepatic arteries of the Wistar rats (W256). All of the rats were divided randomly into five groups, group 1: control, group 2: normal saline, group 3: conventional ADM, group 4: placebo ethylcellulose microspheres, and group 5: ADM-EC mc. Results As compared with other four groups, the ADM-EC mc (group 5) showed the best inhibition of the growth of tumors and the longest mean life length of the rats. Conclusion Hepatic arterial infusion of ADM-EC mc can inhibit the growth of the tumor, aggravate the necrosis, and improve the effects of the chemotherapy of liver cancer.