A method for controlling a user equipment, UE, to access a communications network of a high-speed moving vehicle performed by a first core network control plane node device, the method comprising: • Determining that the UE accessing a public network is a first-type UE, wherein the first-type UE is an UE used by a user taking the high-speed moving vehicle (S 201), wherein the determining that the UE accessing the public network is the first-type UE comprises: ∘ receiving notification information sent by a second core network control plane node device, and determining that the UE is the first-type UE according to the notification information, or ∘ receiving first indication information sent by a public network base station, wherein the first indication information is used to indicate that the UE is the first-type UE; and determining that the UE is the first-type UE according to the first indication information; and • Transferring the UE to the communications network of the high-speed moving vehicle (S 202), wherein the transferring the UE to the communications network of the high-speed moving vehicle comprises: ∘ sending second indication information to the public network base station, wherein the second indication information is used to indicate that the UE is the first-type UE and to instruct the public network base station to transfer the UE to the communications network of the high-speed moving vehicle; or ∘ rejecting a request for accessing the public network by the UE causing the UE to access the communications network of the high-speed moving vehicle. • Determining that the UE accessing a public network is a first-type UE, wherein the first-type UE is an UE used by a user taking the high-speed moving vehicle (S 201), wherein the determining that the UE accessing the public network is the first-type UE comprises: ∘ receiving notification information sent by a second core network control plane node device, and determining that the UE is the first-type UE according to the notification information, or ∘ receiving first indication information sent by a public network base station, wherein the first indication information is used to indicate that the UE is the first-type UE; and determining that the UE is the first-type UE according to the first indication information; and ∘ receiving notification information sent by a second core network control plane node device, and determining that the UE is the first-type UE according to the notification information, or ∘ receiving first indication information sent by a public network base station, wherein the first indication information is used to indicate that the UE is the first-type UE; and determining that the UE is the first-type UE according to the first indication information; and • Transferring the UE to the communications network of the high-speed moving vehicle (S 202), wherein the transferring the UE to the communications network of the high-speed moving vehicle comprises: ∘ sending second indication information to the public network base station, wherein the second indication information is used to indicate that the UE is the first-type UE and to instruct the public network base station to transfer the UE to the communications network of the high-speed moving vehicle; or ∘ rejecting a request for accessing the public network by the UE causing the UE to access the communications network of the high-speed moving vehicle. ∘ sending second indication information to the public network base station, wherein the second indication information is used to indicate that the UE is the first-type UE and to instruct the public network base station to transfer the UE to the communications network of the high-speed moving vehicle; or ∘ rejecting a request for accessing the public network by the UE causing the UE to access the communications network of the high-speed moving vehicle. <EOS>