Research purposes:Aiming at the problems of high investment failure rate and lack of scientific and effective investment decision-making methods for China's high-speed railway"Go-Global"under the background of"Belt and Road Initiative",based on the perspective of enterprises and on the basis of risk decision-making,combined with the investment characteristics of overseas high-speed railway construction projects,it establishes a progressive decision-making model of investment risk,which provides a new way of thinking for the investment decision-making of overseas high-speed railway construction projects.Research conclusions:(1)Breaking through the limitations of the single object,method and form of the previous research,it adopts a more rigorous longitudinal progressive decision-making framework to study the risk of China's high-speed railway enterprises'overseas investment.(2)The method of Grounded Theory is adopted to refine decision-making indicators,and a two-layer decision-making indicator system is established for macro-location environment and micro-project characteristics.(3)The methods such as ELM and Nonlinear Combination Empowerment Cloud Model are introduced into investment risk decision-making of overseas high-speed railway construction projects,to effectively reduce the influence of experts'subjectivity and enhance the dynamics and accuracy of decision-making.(4)The research results can provide realistic support for China's high-speed railway"Go-Global"enterprises to make scientific and effective investment decisions in the international engineering market.
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