In the field of budget supervision，China has adopted a national monitoring mode.Such supervision mode will lay a hidden generative collusion between Budget Units and Administrative Supervision Departments.In order to eliminate or reduce this risk，we use the Game Theory as a means to analyze the mode of national supervision and the mode of public participation in the supervision.It can prove that if the public as a public body is involved in budgetary national supervision，it will be a helpful way to eliminate risks of potential threats.Public participation in supervision mode will have a profound impact on the future of the government budget.