Objective: To explore the problems existing in the coordination between the departments involved in the current system reform and provide policy suggestions for the construction of the future basic medical security system.Methods: The policy documents related to the medical security system reform since 1985 were sorted out.Based on the theory of collaborative governance,the policy network research method was used to analyze the network density,clustering coefficient,path length and other indicators of the policy network of the functional departments participating in the reform.The relationship structure of all departments was concretely represented and the relationship network of departments was visualized.Results: At present,the cohesion among the participants of the medical insurance system reform in China has declined,the policy resources of the medical security system reform are controlled by a few main functional departments,and some marginal functional departments lack the right to speak.Conclusion: The participating functional departments should unify their values,open up communication paths,clarify the division of responsibilities and strengthen synergies.