A method for activating a Secondary Cell Group, SCG, comprising: sending, by a UE, indication information to a network-side network element, the indication information being used for indicating a first data radio bearer in data radio bearers maintained by the UE, and the first data radio bearer being a data radio bearer needing to send uplink data; receiving, by the UE, configuration information returned by the network-side network element according to the indication information; and resuming, by the UE, the first data radio bearer according to the configuration information; wherein receiving configuration information returned by the network-side network element according to the indication information comprises: receiving, by the UE, a Radio Resource Control, RRC, connection reconfiguration message sent by the network-side network element, wherein the RRC connection reconfiguration message includes SCG configuration information of the UE, and the SCG configuration information is used for instructing the UE to activate or not to activate a SCG, in a case that the UE in an RRC connected state sends the indication information to the network-side network element, receiving the RRC connection reconfiguration message sent by the network-side network element; determining, by the UE, whether to activate the SCG according to the SCG configuration information; wherein the indication information comprises: a first Identity, ID, for indicating a type of radio resource used by the first data radio bearer, or indicating that there is uplink data of the data radio bearer using SCG resources needing to be sent. sending, by a UE, indication information to a network-side network element, the indication information being used for indicating a first data radio bearer in data radio bearers maintained by the UE, and the first data radio bearer being a data radio bearer needing to send uplink data; receiving, by the UE, configuration information returned by the network-side network element according to the indication information; and resuming, by the UE, the first data radio bearer according to the configuration information; wherein receiving configuration information returned by the network-side network element according to the indication information comprises: receiving, by the UE, a Radio Resource Control, RRC, connection reconfiguration message sent by the network-side network element, wherein the RRC connection reconfiguration message includes SCG configuration information of the UE, and the SCG configuration information is used for instructing the UE to activate or not to activate a SCG, in a case that the UE in an RRC connected state sends the indication information to the network-side network element, receiving the RRC connection reconfiguration message sent by the network-side network element; determining, by the UE, whether to activate the SCG according to the SCG configuration information; wherein the indication information comprises: a first Identity, ID, for indicating a type of radio resource used by the first data radio bearer, or indicating that there is uplink data of the data radio bearer using SCG resources needing to be sent. receiving, by the UE, a Radio Resource Control, RRC, connection reconfiguration message sent by the network-side network element, wherein the RRC connection reconfiguration message includes SCG configuration information of the UE, and the SCG configuration information is used for instructing the UE to activate or not to activate a SCG, in a case that the UE in an RRC connected state sends the indication information to the network-side network element, receiving the RRC connection reconfiguration message sent by the network-side network element; determining, by the UE, whether to activate the SCG according to the SCG configuration information; wherein the indication information comprises: a first Identity, ID, for indicating a type of radio resource used by the first data radio bearer, or indicating that there is uplink data of the data radio bearer using SCG resources needing to be sent.