Fraud identification method and system based on multi-source tag fusion

The invention belongs to the technical field of fraud prevention, and provides a fraud identification method and system based on multi-source tag fusion. The method comprises the following steps: collecting numbers and tag detail data corresponding to various data sources; comprehensively evaluating the accuracy rate, the data volume and the label distribution condition of the labels of different sources, determining the weight, the threshold value and the reference item of each type of data source so as to calculate the label scores corresponding to different data sources of each number, and selecting a specified number of label scores for fusion so as to obtain a fusion label; and determining a fusion label of the to-be-processed number, so as to carry out fraud prevention processing according to the determined fusion label. The label to which the number belongs can be judged objectively and reasonably through label fusion, and the accuracy of the number label can be further improved. 本发明属于防欺诈技术领域，提供一种基于多源标