There is a strange phenomenon in medicine market of china: abuse of a lot of expensive medicine such as antibiotic, while the low price medicine disappearing in market, and the medicine price is going higher and higher to pay for by patient. This is indeed a disaster in health care system of China. In this paper, we set up a system dynamics model to demonstrate the deep mechanism: this is mainly due to medicine price policy; afterwards, a serials policy is proposed to handle this disaster.