Multi-relational graph network-based vulnerability model construction method and detection method thereof

The invention discloses a multi-relational graph network-based vulnerability model construction method and a detection method thereof, and the method comprises the steps: collecting a source code program file, carrying out the preprocessing of the source code program file, obtaining a function block, and according to whether a function name corresponding to the function block contains a good and a bad, enabling a corresponding label to be a function block without a vulnerability and a function block with a vulnerability; processing the function blocks without the vulnerabilities and the function blocks with the vulnerabilities to obtain respective corresponding second abstract syntax trees; and performing first traversal on the second abstract syntax tree to obtain seven edge relationships. On the basis of extracting node information of the abstract syntax tree in the prior art, seven edge relationships are added, and the seven edge relationships can remarkably improve the accuracy rate in the aspect of vulne