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Based on the cross-border panel data of China and 149 Belt and Road Countries (BRCs), this book uses the difference-in-differences model, the spatial econometric model and the stochastic frontier model to examine the relationship between economic risk and China's foreign infrastructure investment from the perspective of scale and efficiency. At the same time, we also pay attention to the role of the Belt and Road Initiative in it. The main policy implications include: deepen cooperation with BRCs to create a favorable environment for the internationalization of enterprises; continue to support enterprises to go global, participate in infrastructure co-construction, and gradually strengthen infrastructure connectivity with BRCs; the Chinese government should actively explore judicial coordination and investment protection mechanisms to help enterprises avoid risks; China should focus on optimizing the industry and location layout of foreign investment and improving investment ef