In order to explore the way of construction of integrated health care system, Medical Alliancesin County is one of the most important practice model in China.Global budget payment has became the core policy tool to establish the incentive-constraint mechanism to integrate the interest of stake holders.This paper discussed how to use the policy tool of global budget payment to establish an ideal incentive-constraint mechanism of medical alliances in county.Through the analysis of reform case,this paper found some problem :the stakeholders,who had strong information advantage and control,played a limited role in policy making and other parts of policy process;incentive effect should be improved,which is based on insurance balance,the medical and health service price of insurance,remuneration.It is suggested to further improve the benign consultation and communication mechanism with multiple stakeholders,and strengthen the participation of stakeholders with strong information advantages and control,such as medical staff of other member units other than the lead hospital.Deepening the“Tripartite Medical System”reform ,we will establish a pricing mechanism for medical insurance with consultation and market access,and strengthen the incentive role of medical and health service income.Based on the open and equal negotiation and consultation mechanism,a more scientific global budget and risk sharing mechanism should be established to provide benign incentives.And establish the information disclosure system and gate keeper system.