Information physical system key node identification method for coping with network attack

The invention relates to the technical field of cyber-physical interaction, and discloses a cyber-physical system key node identification method for coping with network attacks. The method comprises the following steps: firstly, establishing an information physical system coupling dependent network topology model, then establishing an information physical system key node evaluation index system which is used for coping with network attacks and considers double-side coupling influence, and then evaluating and weighting node criticality indexes based on a decision experiment and an evaluation experiment-network analytic hierarchy process; and finally, according to the normalized criticality indexes and the weight of each index, calculating the comprehensive criticality of the nodes of the information physical system. According to the method, multiple factors are comprehensively considered, the key nodes in the electric power information physical system are efficiently and accurately identified, corresponding mo