Abstract: In order to uncover the dilemma of service innovation in an open network environment. Based on social network theory and organizational search theory, an empirical test was made by multiple regressions model to analyze the impact mechanism of network position on service innovation performance of manufacturing enterprises. Through the analysis of 313 Chinese manufacturing enterprises research data and found that: Network position has a significant positive impact on the service innovation performance of manufacturing enterprises; Boundary-spanning partial mediates the relationship between the network position and the service innovation performance of manufacturing enterprises; Absorptive capacity moderates the relationship between boundary-spanning search and service innovation performance of manufacturing enterprises, while the mediating role of boundary-spanning search in the relationship between network position and service innovation performance of manufacturing enterprises is moderated by absorptive capacity. This paper extends the research on effects of network position, further clarifies the mechanism and boundary conditions of the impact of network position on service innovation performance of manufacturing enterprises，and offers practical implications for manufacturing enterprise to use boundary-spanning search to break through resource limitations and promote service innovation rapidly.