A wireless communications network registration method, performed by a dual-card dual-pass terminal, wherein the terminal comprises a first modem and a second modem, and the method comprises: reading, by the terminal, a service provider identifier from a subscriber identity card, characterized in that: if a quantity of subscriber identity cards in the terminal is 1 and the service provider identifier of the subscriber identity card is a preset identifier, performing, by the terminal, packet switched PS registration for the first modem by using the service provider identifier of the subscriber identity card, and performing, by the terminal, circuit switched CS registration for the second modem by using the service provider identifier of the subscriber identity card, and if the quantity of subscriber identity cards in the terminal is 1 and the service provider identifier of the subscriber identity card is not the preset identifier, performing, by the terminal, CS registration and PS registration for the first modem by using the service provider identifier of the subscriber identity card; wherein after the performing, by the terminal, CS registration and PS registration for the first modem by using the service provider identifier of the subscriber identity card, the method further comprises: performing, by the terminal, PS registration for the second modem by using the service provider identifier of the subscriber identity card if the terminal is in a call state and a current network standard of the terminal is GSM. reading, by the terminal, a service provider identifier from a subscriber identity card, characterized in that: if a quantity of subscriber identity cards in the terminal is 1 and the service provider identifier of the subscriber identity card is a preset identifier, performing, by the terminal, packet switched PS registration for the first modem by using the service provider identifier of the subscriber identity card, and performing, by the terminal, circuit switched CS registration for the second modem by using the service provider identifier of the subscriber identity card, and if the quantity of subscriber identity cards in the terminal is 1 and the service provider identifier of the subscriber identity card is not the preset identifier, performing, by the terminal, CS registration and PS registration for the first modem by using the service provider identifier of the subscriber identity card; if a quantity of subscriber identity cards in the terminal is 1 and the service provider identifier of the subscriber identity card is a preset identifier, performing, by the terminal, packet switched PS registration for the first modem by using the service provider identifier of the subscriber identity card, and performing, by the terminal, circuit switched CS registration for the second modem by using the service provider identifier of the subscriber identity card, and if the quantity of subscriber identity cards in the terminal is 1 and the service provider identifier of the subscriber identity card is not the preset identifier, performing, by the terminal, CS registration and PS registration for the first modem by using the service provider identifier of the subscriber identity card; wherein after the performing, by the terminal, CS registration and PS registration for the first modem by using the service provider identifier of the subscriber identity card, the method further comprises: performing, by the terminal, PS registration for the second modem by using the service provider identifier of the subscriber identity card if the terminal is in a call state and a current network standard of the terminal is GSM.