Considering spatial dependency of tacit knowledge from FDI which can motivate knowledge spillover among regions, it developed the model of international R&D knowledge spillover from linear structure into nonlinear structure named spatial Durbin model. By using the panel data including 31 Chinese provinces from 1992 to 2011, it finds that the explicit knowledge embedded in capital goods via foreign investing and importing hasn't improved local total factor productivity, but the un-embedded tacit knowledge from FDI has promoted other regions' ...