The present invention relates to the technical field of data screening, and provides a marketing customer screening method based on a tag library. The method comprises the following steps: S1, loading two customer collections into a system memory, each of the customer collections consisting of at least one customer set, and the customer set comprising a customer ID and at least one tag matching the customer ID in one or more dimensions; and S2, screening the two loaded customer collections in a preset comparison dimension according to a preset kneading rule, and output the screening result. Before screening, the customer collections are loaded into the memory in advance so as to increase the screening speed; different screening rules can be selected, and recognition can be conducted according to a self-selected dimension so as to quickly generate different screening results and meet different needs of marketing.
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