Focusing on technology spillover’s bridge effect between bidirectional Foreign Direct Investment (FDI) and Global Value Chain (GVC) position of manufacturing industry, this paper first analyzes theoretical mechanism of bidirectional FDI’s influence on GVC position, by taking into account technology spillover perspective, and then it verifies the theoretical framework by using 15 Chinese manufacturing sub-industries data in the latest ten years. The Generalized Least Squares regression results prove that technology spillover plays as a core channel of both Inward FDI’s and Outward FDI’s GVC position promotion effect, and the interactive development of bidirectional FDI can further significantly enhance this bridge effect.