Based on the sharing mode of supply chain resources in the environment of cloud service, this research constructed the evolutionary game model of supply chain resource-sharing to reveal the behaviors between two types of enterprise, the equilibrium in model and local stability are analyzed under the state of uniform mixed and non-uniform mixed populations. By using the method of system dynamics, the evolutionary game model is built, and a contrastive analysis of evolutionary results affected by diverse parametric variations is performed. The results of the research shows that the evolutionary trends of the game are significantly influenced by the initial sharing proportion in enterprise group, the cost and benefit of upgrading equipment, and the risk of technological loss. To facilitate the information interaction and resource sharing between enterprises, continuous improvement needed to be done in line with the above aspects.