The invention discloses an illegal information processing method and device. The method comprises the following steps of establishing a number identification model by adopting a logistic regression algorithm; training the number identification model through sample data in order to obtain characteristic parameters of an illegal number; capturing a calling event from a calling terminal in real time;mining the calling event by utilizing the trained number identification model, and identifying the number of the calling terminal according to the characteristic parameters of the illegal number; andwhen the number of the calling terminal is the illegal number, intercepting a signaling data flow of the calling terminal and/or sending a warning prompt to a called terminal. According to the embodiments, the illegal number can be identified actively and accurately through the number identification model, the reliability of subsequently intercepting illegal information and sending the warning prompt can be improved on the basis of accurately identifying the illegal number, and the user experience is improved.