User identifier association method and device, equipment and storage medium

The invention discloses a user identifier association method and device, equipment and a storage medium, and relates to the technical field of user identifier association, and the method comprises the steps: obtaining user identifiers of a target user in a plurality of business modules and an association relationship between the user identifiers; wherein the service module comprises at least one user identifier; constructing a directed graph based on the plurality of user identifiers and the association relationship; wherein nodes of the directed graph are user identifiers, and directed edges of the directed graph are in an incidence relation; determining a confidence score of each identification node in the directed graph by using a confidence propagation algorithm; and taking the confidence score as a weight score of the corresponding association relationship to obtain a directed weighted graph. According to the method, the directed weighted graph with relatively high accuracy is generated, the technical pr