Objective : Simulating the Operation of Basic Medical Insurance Fund in Heilongjiang Province and studying the balance of income and expenditure of health insurance fund under different intervention policies by Applying the ProModel Simulation Software. Methods: Using ProModel simulation software construct the basic medical insurance system simulation model. Based on the historical data of Heilongjiang Province medical insurance in Heilongjiang Province, The simulation experiment of the basic medical insurance in Heilongjiang Province is simulated. Results: Intervention simulation experiments show that maintaining the basic variable growth rate, raising the funding standard, the health care fund balance increased;Raise funding standards, change the flow of treatment, health care fund changes more moderate; Improve the financing standards and appropriate adjustment of the level of compensation, health care fund balance has changed; A djust Financing standards, treatment flow and the level of compensation at the same time, the health care fund balance is more reasonable than before. Conclusion : Improve the level of financing of different medical insurance, the initial implementation of the classification of medical treatment will ensure the balance of basic medical insurance and improve the balance of the three health insurance fund