Today innovation has become the fundamental driving force for the survival and development of enterprises. If enterprises want to keep up with the pace of the times, they must use new technologies and new services to improve the product quantity and service quality. Innovation is contained in every process of enterprise management. The innovation process of manufacturing industry includes number of links which include from basic research to application research, then to experimental development and product production and new product launch. The creation and transfer of innovation resources in different links also create a variety of innovation modes. From the micro level of industry and enterprise, compared with other types of enterprises, manufacturing enterprises need to rely on innovation to improve enterprise performance because of its complex process. Under the guidance of service economy, the role of service has become increasingly prominent, becoming the main economic growth zone of enterprises. The application of service innovation in enterprises is increasingly extensive and in-depth. The service innovation of manufacturing enterprises is a series of innovation activities that enterprises carry out around the changes of service content and customer interaction in the whole product life cycle. As the focus of value-added creation in manufacturing industry has shifted to service elements, manufacturing enterprises tend to upgrade and restructure their industries through service innovation, which has become an effective way for manufacturing enterprises to obtain new sustainable competitive advantages. From the macro level, China is already the largest manufacturing country in the world. To realize the transformation from a big manufacturing country to a powerful manufacturing country, it is necessary to improve the quality and level of the development of the manufacturing industry, and to achieve the goal of moving forward to the middle and high-end industries. It is also necessary to continue technological innovation and service innovation. Manufacturing enterprises urgently need to carry out more in-depth and more extensive service innovation. Leading managers of manufacturing enterprises have realized the importance of service innovation. However, at present, the academic research on the motivation of service innovation of manufacturing enterprises is relatively scattered, lacking systematic and complete thinking, and the dynamic mechanism of service innovation is still vague. It is not only an important supplement to the existing service innovation theory, but also helpful to clarify the key points of service innovation management. It is of great practical significance for manufacturing enterprise managers to carry out service innovation pertinently. 

An empirical study has been made in this paper which study on the driving force of service innovation in manufacturing enterprises and the relationship between different driving forces through structural equation model. First of all, the connotation of service innovation and its influencing factors have been investigated in manufacturing enterprise personnel; secondly, experts were organized to discuss and design the scale on the basis of theoretical research, experience accumulation and reference of previous research results; thirdly, structured interviews were conducted on the issues related to service innovation motivation; and finally, through the distribution and collection of questionnaires, sorting out and analyzing the questionnaire data, using the covariance structural equation model to verify the theoretical hypothesis of this paper. 

In terms of specific research, the relevant theories of service innovation of manufacturing enterprises have been combed in this paper, and deconstructs three driving forces of service innovation of manufacturing enterprises which are external trigger, enterprise innovation consciousness and internal basis. External trigger is measured by "customer demand", "horizontal competition", "government incentive" and "supplier improvement". Innovation consciousness is measured by "need and motivation awareness", "enterprise innovation awareness" and "supplier improvement". The internal foundation is measured by "its infrastructure", "its human resources", "its coordination resources", "enterprise strategy" and "knowledge base". Service innovation is measured by "service concept innovation", "service delivery system innovation", "service delivery interface innovation", "service support technology innovation" and "service content innovation ". 

To ensure the accuracy and reliability of the research data, SPSS 19.0 was used to test the validity and reliability of the scale, and confirmatory factor analysis was used to estimate the implicit validity of the measurement method. The empirical results show that external trigger, enterprise innovation awareness and internal foundation all promote the service innovation of manufacturing enterprises, among which the direct promotion effect of innovation consciousness is the strongest, followed by external trigger and internal basis, and the external trigger and internal foundation also promote the service innovation of manufacturing enterprises through the intermediary variable of innovation consciousness. From the perspective of driving force, this study opens the internal black box of service innovation development of manufacturing enterprises, promotes manufacturing enterprises to carry out service innovation to obtain new sustainable competitive advantages, provides reference for managers in manufacturing enterprise to consciously drive and guide service innovation, and promotes the high-quality development of China′s manufacturing industry.