Technological innovation can promote the growth of international service outsourcing in China by advancing enterprise ability to undertake international service outsourcing, human resource quality, upgrading of international service outsourcing industry and base building of international service outsourcing. Based on the relative data from 10 areas where the international service outsourcing is developed best in China, this article builds the regression model to study the effect of technological innovation on international service outsourcing. The result indicates that technological innovation can promote obviously the development of international service outsourcing. Some suggestion should be taken to accelerate the technology innovation ability of china, such as adding the input to technological innovation, encouraging talent engaged in the international service outsourcing industry, optimizing environment of technological innovation.