Disclosed are a network access method and a mobile communication terminal, comprising: upon detecting the type of a subscriber identity module being inserted for the first time into a mobile communication terminal, public land mobile networks (PLMNs) of a network format supported by the mobile communication terminal are determined on the basis of the type of the subscriber identity module; network identities of the PLMNs of the network format supported by the mobile communication terminal as determined are added to an equivalent public land mobile network (EPLMN) list; and finally, when a PLMN matching either network identity in the EPLMN list is found, a communication connection between the mobile communication terminal and the matching PLMN is established.