Named entity recognition model construction method and device, equipment and storage medium

The invention provides a named entity recognition model construction method, which comprises the steps of performing first N times of iterative training on a preset model by utilizing a text sequencecontaining entity information to obtain an initial model, the text sequence containing the entity information comprising a partial annotation text sequence and/or a complete annotation text sequence;reannotating the unannotated text sequence and/or the partially annotated text sequence by utilizing the initial model to obtain a new partially annotated text sequence; performing (N + 1) th to (N +m) th iterative training on the preset model by utilizing all the partial annotation text sequences including the new partial annotation text sequence to obtain an intermediate model, and adjusting parameters of the intermediate model to obtain a named entity recognition model, wherein the unlabelled text sequence does not contain entity information, part of entities in part of the labelled text sequence are labelled, and a