Document-level event argument extraction method and device, equipment and medium

The invention provides a document-level event argument extraction method and device, equipment and a medium, and the method comprises the steps: inputting a document, obtaining an event set, a trigger word set, a role set and an argument set in the document, constructing an argument extraction student model, and predicting the argument sets of all events based on the document. Establishing a teacher model of an event internal level for each event to obtain argument association in each event, and establishing a teacher model of an inter-event level to obtain cross-event argument association in the document, the method comprises the following steps: migrating event association knowledge to an argument extraction student model from a teacher model of an internal level of each event and a teacher model of an inter-event level on the basis of multi-teacher distillation by adopting a feature alignment and logit alignment mode, and then determining a total cost function of the argument extraction student model; and