Security monitoring method for industrial control system network

The invention discloses a security monitoring method for an industrial control system network, and relates to the technical field of nuclear power station industrial control system network security. Firstly, industrial control metadata of an industrial control system network is acquired, feature information of the industrial control metadata is extracted, then the feature information of the industrial control metadata is input into a preset model, and finally, a risk index of industrial control system network security is acquired according to a result output by the preset model, wherein the industrial control metadata comprises data packets transmitted in the industrial control system network. On the basis that normal operation security and operation efficiency of the industrial control system network of a nuclear power station are not affected, monitoring of safe operation data of the industrial control system network is achieved, and therefore the security and reliability of the industrial control system ne