Trademark image retrieval method and system, medium and equipment

The invention relates to a trademark image retrieval method and system, a medium and equipment. The trademark image retrieval method comprises the following steps: according to all similar group numbers of each trademark classification number, carrying out library division on a feature library containing feature vectors of trademark images; clustering the feature vectors of the trademark images ineach sub-library according to the determined number of the clustering centers, and dividing a sub-library for the feature vectors belonging to the same clustering cluster in each sub-library; determining a sub-library to which the to-be-queried trademark belongs according to the classification number of the to-be-queried trademark and the trademark image; calculating the distance between the feature vector of the trademark image of the trademark to be inquired and the feature vector of the trademark image in the subordinate sub-library; and outputting the trademarks corresponding to the feature vectors of the first N