| Government investment project is the construction project completed by using government funds, which plays an important part in social investment in China. It has always been widely concerned and researched because of its large investment scale. It also has a guiding role for the other investment, and is closely related to the people’s livelihood. With the practice of government investment project, government gradually improves its regulations and actively promotes the application and reform of Agent Construction in management system and management mode. However, there are still many problems in the actual construction process. Various defects of Agent Construction management are gradually revealed, which has been seriously restricting the project social benefit improvement. Consequently, it is a worthy research region to analyze the behavior decision and the game process of the government investment project participants from the perspective of government supervision. And an effective optimization method is expected to be found out.This study takes how to optimize the government investment project supervision as the main line of research, and analyzes government investment project participants. Then game model is constructed and regulatory optimization is proposed to solve the problem of collusion rent-seeking among the participants. This study considers that the government investment project participants mainly include investor, regulator and agent from the perspective of government supervision. The investor is National Development and Reform Commission. The regulator includes two parts of administration departments and independent supervision institute which supervises and manages the project according to the different duties. It is found that the main government investment project collusion risk exists between administration departments and Agent departments. Therefore, this study is to study behavior decision tendency of this collusion based on game theory. In the end, this study constructs two parts game model and three parts game model to solve the mixed strategy of Nash equilibrium of model. And then this study proposes regulatory dynamic optimization and regulatory recommendations based on the results of the game to improve the social benefit and management efficiency of the government investment project.This study considers that game often focuses on agent and contractor, supervision unit when being researched from the point of view of stakeholders. However, government investor and administrative departments also play important parts and should not be neglected. Therefore, from the perspective of government supervision, this study analyzes the rent-seeking game among investor, administration departments and agent, and mainly studies the rent collusion between administration departments and agent to propose effective regulatory decision-making and regulatory measures. This study hopes to not only intensify game method research on the field of government investment projects, but also provide a theoretical reference for the project management optimization method. |