Similarity detection method and device for CAD models, terminal equipment and storage medium

The invention discloses a similarity detection method for CAD models. The similarity detection method comprises the following steps: determining a surface element topological relation corresponding to each CAD entity model; constructing a point adjacency graph of each CAD entity model by utilizing the topological relation of the surface elements of each CAD entity model and the surface elements of each CAD entity model; based on the point adjacency graph of each CAD entity model, obtaining an information expression result of each CAD entity model; and based on the local feature corresponding to each CAD entity model and the feature topological relation among the local features in each CAD entity model, determining a similarity detection result of the plurality of CAD entity models. The invention further discloses a similarity detection device for the CAD models, terminal equipment and a computer readable storage medium. By adopting the method provided by the invention, the information expression result can ac