Although asymmetry of information and positive externalities in venture capital provide the justification for government intervention, no one can guarantee that distortion of resource allocation does not exist when government correct market failures. From the point view of incomplete contract theory, government intervention could affect the achievement of contract for the unverified information and actions, leading to inefficiency of venture capital, therefore It is important for us to understand the performance of public policy which is how to improve how to improve the venture capital. To establish the sequential offer game model with moral hazard of entrepreneur, considering with the additional funds provided by the government and certification of quality as well as the spillover effects of venture capital. Under the assumption that the government has the ability to identify high-ability entrepreneur, the introduction of government leading fund and the arrangement of control can induce more specific investment of entrepreneurs. The preceding investment provide investors with additional information, therefore it is optimal. The non-government leading fund supported entrepreneurs will face with worse situation since limited funding and the requirements of capital preservation. Therefore government leading fund should carefully select the investment strategy.