Abstract:With the rise of the service economy,service innovation has become an important source of business competitive advantage.As the basic goal of scientific research,service innovation is essentially a process through capability exchange and interaction to achieve knowledge and information transfer,and the degree of knowledge sharing among service systems influences the service innovation.This article uses the game theory to set up a game model that the knowledge sharing in service innovation and studies its evolutionary path.The analysis indicates that the level of knowledge sharing has positive correlations with the extent of rewards and penalties,the numbers of cooperation and the coordination coefficient during the service innovation.