Abstract:It’s important to investigate whether it is effective to solve difficult-financing problem by leading a credit rating agency into financing market. Investors,technological enterprises and credit rating agencies are included in the game model to get a general equilibrium solution. The there conclusions form the solution are as follows: The higher the proportion of good enterprises is, the higher the financing quantity is.The pace of the increasing of the enterprise quality is not synchronize with the pace of the increasing of investment willingness. The human input of credit rating agencies probably influence the market clearing.