Malicious telephone number processing method and device

The embodiment of the invention provides a malicious telephone number processing method and device. The method comprises the following steps: acquiring call characteristics of each calling number in amalicious telephone number library in a sampling period; for each number segment group, identifying a plurality of group numbers from the calling numbers in the number segment group according to thesimilarity among the calling numbers in the number segment group; wherein each calling number in the number segment group has the same first N number segments; wherein the similarity between the calling numbers in the number segment group is determined according to the call characteristics of the calling numbers in the number segment group; wherein each identified group number satisfies the following conditions: the similarity between one group number and at least another group number in the number segment group is higher than a set threshold; and adding the group numbers identified from the number segment groups to a