As a new financing mode, risk management and decision-making is always the focus of Public-Private-Partnerships (PPP) project management. This study takes the brain mechanism of objective decision-making of PPP project risk management as the research target. From the perspective of decision-making neuroscience, the study uses literature research method, decision-making neuroscience experiment method, inductive summary and others to introduce the event-related potential (ERP) technique and to analyze the ERP components of the subjects from exposure to the risk situation to decision making during the experiment. It is found that the ERP components related to the risk decision-making stage are mainly P2, N2 and P3, but there is no significant difference between P2 and P3 in different uncertainty risk decision situatios, and the amplitude of N2 component increases with the increase of uncertainty of risk information, which proves that the component is closely related to objective decision-making of project risk management. This research result is of practical significance for effective and scientific risk management and decision-making of managers.

PPP Projects, Risk Management, Decision-making Neurology, Decision-making Brain Mechanism