The embodiments of the invention provide a method and a device for processing abnormal network communication function and a mobile terminal, wherein the method comprises the following steps: receivingan abnormal processing notification sent by a modem of the terminal, wherein the abnormal processing notification is used for indicating that processing of a dedicated bearer of the modem is abnormal; detecting whether the number of times of abnormal processing of the dedicated bearer of the modem in a preset time period exceeds a preset threshold value or not; resetting the modem if the detection result is no; and if the detection result is yes, turning off a first protocol stack which is currently causing an abnormality in the modem, and starting a second protocol stack, wherein the modem supports at least two protocol stacks; and if the mobile terminal successfully performs network registration based on the second protocol stack, recording the current attribute of the mobile terminal.According to the method, the device and the mobile terminal, abnormal processing can be carried out in a targeted mode according to the abnormal reasons, the network usage of the mobile terminal is restored, the practicability of the abnormal processing is improved, and the convenience is improved.