Knowledge graph construction method based on manufacturing industry full life cycle data

The invention relates to a knowledge graph construction method based on full-service full-product life cycle data in the manufacturing industry, and the method comprises the following steps: S10, constructing a preliminary knowledge graph from top to bottom based on expert knowledge, the construction of the knowledge graph defining the type of key entities and the relationship between the key entities; s20, part of complete full-life-cycle data of the manufacturing industry products are tracked and collected to serve as the most basic training data containing labels, and then for a large amount of full-life-cycle statistical-level data, the statistical-level data are divided into a plurality of sub-graphs according to the time dimension; s30, constructing a graph Markov model, for each adjacent time slice, analyzing the initial state of the sub-graph and the value of the final state between the states, calculating a change difference value as training data, substituting the change difference value into the gr