The embodiment of the invention provides a malicious domain name detection processing method and device. The method comprises the steps of obtaining domain name information of a domain name to be detected within a preset time period; calculating an eigenvalue of at least one dimension of the domain name to be detected according to preset rules on the basis of the domain name information; and performing malicious domain name detection processing on the domain name to be detected through a preset classifier model according to the eigenvalue, wherein the preset classifier model is obtained by performing machine classification learning through training samples. The device is used for implementing the method. According to the method and device provided by the invention, the eigenvalue of the domain name to be detected is calculated according to the preset rules on the basis of the obtained domain name information of the domain name to be detected, and malicious domain name detection processing is performed through the preset classifier model according to the eigenvalue, so that the efficiency and accuracy of malicious domain name detection are improved.