Based on the local government's subsidy for the industrial internet platform and the platform of manufacturing enterprises, and the cost sharing between the industrial internet platform and the manufacturing enterprise, this paper constructs the asymmetry evolutionary game model between ``government-platform-enterprise” , using the stability theorem of differential equations to analyze the strategy evolution path of each game player and the factors that affect their strategy evolution, and discuss the evolutionary stability strategy of the system through the Jacobian matrix. In the numerical simulation part, the influence of government subsidy intensity and platform cost sharing ratio on the system evolution and stability strategy is analyzed, and the effective interval of government subsidy intensity and cost sharing ratio is defined, which can encourage the manufacturing enterprise to join the platform and industrial Internet platform to optimize the service, and provide a theoretical reference for local governments, industrial Internet platforms and manufacturing enterprises to make behavioral decisions.