The invention is applied to the field of mobile communications, and provides a communication processing method and system in a mobile virtual network. The method comprises the following steps: obtaining a subscriber number initiating an unstructured supplement data service trigger service event; querying a virtual network which the subscriber number belongs to, and determining the number of a subscriber needing to initiate group communication in the virtual network; and initiating the group communication to the number of the subscriber needing to initiate the group communication. In the invention, a subscriber can initiate group communication to other subscribers in a virtual network which the subscriber belongs to by initiating an unstructured supplement data service trigger service event, such that the process of a user to carry out the group communication through a terminal is simplified, and rapid group communication is realized.