A method for handling a radio link failure, RLF, comprising: in a case that data of a first radio bearer reaches a maximum number of retransmissions on a first radio link control, RLC, entity corresponding to the first radio bearer, deactivating, by the terminal device, a replication data transmission function of a packet data convergence protocol, PDCP, entity corresponding to the first radio bearer; and deactivating, by the terminal device, a replication data transmission function of a PDCP entity corresponding to a second radio bearer, so that data transmission of the second radio bearer is not affected by the case that the data of the first radio bearer reaches the maximum number of retransmissions on the first RLC entity corresponding to the first radio bearer, wherein a carrier mapped by an RLC entity corresponding to the second radio bearer at least partially overlaps with a carrier mapped by the first RLC entity; wherein the replication data transmission function of the PDCP entity comprises replicating one PDCP protocol data unit, PDU, into two replicated PDCP PDUs, and the two replicated PDCP PDUs are transmitted to two RLC entities corresponding to two different logical channels; wherein the deactivating, by the terminal device, the replication data transmission function of a PDCP entity corresponding to the first radio bearer comprises: stopping, by the terminal device, the PDCP entity corresponding to the first radio bearer from replicating the PDCP PDU; stopping, by the terminal device, delivering data to the first RLC entity, and delivering, by the terminal device, data to a second RLC entity corresponding to the first radio bearer; wherein the method further comprises: sending, by the terminal device, indication information to a network device, wherein the indication information is used to indicate that a radio link failure, RLF, occurs on the first radio bearer, and to indicate an identifier of a radio bearer whose replication data transmission function is deactivated by the terminal device. in a case that data of a first radio bearer reaches a maximum number of retransmissions on a first radio link control, RLC, entity corresponding to the first radio bearer, deactivating, by the terminal device, a replication data transmission function of a packet data convergence protocol, PDCP, entity corresponding to the first radio bearer; and deactivating, by the terminal device, a replication data transmission function of a PDCP entity corresponding to a second radio bearer, so that data transmission of the second radio bearer is not affected by the case that the data of the first radio bearer reaches the maximum number of retransmissions on the first RLC entity corresponding to the first radio bearer, wherein a carrier mapped by an RLC entity corresponding to the second radio bearer at least partially overlaps with a carrier mapped by the first RLC entity; wherein the replication data transmission function of the PDCP entity comprises replicating one PDCP protocol data unit, PDU, into two replicated PDCP PDUs, and the two replicated PDCP PDUs are transmitted to two RLC entities corresponding to two different logical channels; wherein the deactivating, by the terminal device, the replication data transmission function of a PDCP entity corresponding to the first radio bearer comprises: stopping, by the terminal device, the PDCP entity corresponding to the first radio bearer from replicating the PDCP PDU; stopping, by the terminal device, delivering data to the first RLC entity, and delivering, by the terminal device, data to a second RLC entity corresponding to the first radio bearer; stopping, by the terminal device, the PDCP entity corresponding to the first radio bearer from replicating the PDCP PDU; stopping, by the terminal device, delivering data to the first RLC entity, and delivering, by the terminal device, data to a second RLC entity corresponding to the first radio bearer; wherein the method further comprises: sending, by the terminal device, indication information to a network device, wherein the indication information is used to indicate that a radio link failure, RLF, occurs on the first radio bearer, and to indicate an identifier of a radio bearer whose replication data transmission function is deactivated by the terminal device.