Model desktop automatic integration method based on directed graph theory

The invention provides a model desktop integration method based on a directed graph theory. The method comprises the following steps: acquiring input/output interface information of each engineering model; constructing a corresponding directed graph structure of the primary edition; for the constructed initial edition digraph structure, storing the connection relationship of the input/output port of each engineering model into the digraph structure to obtain the digraph structure after the first optimization processing; analyzing a loop of the data stream for the directed graph structure after the first optimization processing to obtain a ring structure in the directed graph; performing duplicate removal processing on the ring structure in the directed graph to obtain a final directed graph structure; according to the final directed graph structure, performing automatic layout and typesetting on the engineering models to obtain an integrated model; analyzing a matching relationship of the connected input/outp