The embodiments of the invention provide a method and a device for processing a network communication function abnormity and a mobile terminal. The method can comprise: receiving an abnormity processing notification sent by a modem of the mobile terminal, wherein the abnormity processing notification is used for indicating that the dedicated bearer processing of the modem is abnormal, and the abnormal dedicated bearer processing comprises dedicated bearer activation failure or dedicated bearer modification failure; closing a first protocol stack currently causing the abnormity in the modem, and opening a second protocol stack, wherein the modem supports at least two protocol stacks; and if the mobile terminal succeeds in network registration based on the second protocol stack, recording the current attribute of the mobile terminal. The method and the device can be used for quickly detecting the reason of abnormity generated by the protocol stack of the modem when the network of the mobile terminal is abnormal and processing the specific abnormity according to the reason of abnormity to restore the network of the mobile terminal, thus improving the abnormity processing practicability and the convenience.