This paper analyzed the “budget-price-payment” linkage mechanism among the practice of strategic purchase of medical insurance fund, in order to give full play to the strategic purchasing of medical insurance fund and to promote the coordinated development of medical insurance, hospitals and the drug industry. Based on case of Meishan City, the paper explored the problems in the strategic purchase process of medical insurance funds, demonstrated the necessity and urgency of the exogenous mechanism of medical service pricing, and proposed a dynamic price adjustment approach guided by the budget performance of the medical insurance fund.