A method for disabling a Data Packet Convergence Protocol , PDCP, packet replication function, comprising: receiving (S101) at least one Media Access Control, MAC, Control Element, CE, transmitted by a base station, wherein the MAC CE carries information about a target carrier; and disabling (S102), according to the MAC CE, the PDCP packet replication function of a Data Radio Bearing, DRB, or a Signaling Radio Bearing, SRB, which is mapped on a logical channel corresponding to the target carrier and has the PDCP packet replication function enabled, characterized in that , the receiving (S101) at least one MAC CE transmitted by the base station comprises: receiving a first MAC CE and a number of second MAC CEs transmitted by the base station, wherein the first MAC CE is used for indicating UE to deactivate the target carrier, a number of the second MAC CEs is equal to a number of all DRBs or SRBs which are mapped on the logical channel corresponding to the target carrier and have the PDCP packet replication function enabled, and each second MAC CE is used for indicating to disable the PDCP packet replication function of one DRB or SRB; and the disabling (S102), according to the MAC CE, the PDCP packet replication function of the DRB or the SRB comprises: disabling, according to the first MAC CE and the second MAC CEs, the PDCP packet replication function of all DRBs or SRBs which are mapped on the logical channel corresponding to the target carrier and have the PDCP packet replication function enabled. receiving (S101) at least one Media Access Control, MAC, Control Element, CE, transmitted by a base station, wherein the MAC CE carries information about a target carrier; and disabling (S102), according to the MAC CE, the PDCP packet replication function of a Data Radio Bearing, DRB, or a Signaling Radio Bearing, SRB, which is mapped on a logical channel corresponding to the target carrier and has the PDCP packet replication function enabled, characterized in that , the receiving (S101) at least one MAC CE transmitted by the base station comprises: receiving a first MAC CE and a number of second MAC CEs transmitted by the base station, wherein the first MAC CE is used for indicating UE to deactivate the target carrier, a number of the second MAC CEs is equal to a number of all DRBs or SRBs which are mapped on the logical channel corresponding to the target carrier and have the PDCP packet replication function enabled, and each second MAC CE is used for indicating to disable the PDCP packet replication function of one DRB or SRB; and the disabling (S102), according to the MAC CE, the PDCP packet replication function of the DRB or the SRB comprises: disabling, according to the first MAC CE and the second MAC CEs, the PDCP packet replication function of all DRBs or SRBs which are mapped on the logical channel corresponding to the target carrier and have the PDCP packet replication function enabled. receiving a first MAC CE and a number of second MAC CEs transmitted by the base station, wherein the first MAC CE is used for indicating UE to deactivate the target carrier, a number of the second MAC CEs is equal to a number of all DRBs or SRBs which are mapped on the logical channel corresponding to the target carrier and have the PDCP packet replication function enabled, and each second MAC CE is used for indicating to disable the PDCP packet replication function of one DRB or SRB; and the disabling (S102), according to the MAC CE, the PDCP packet replication function of the DRB or the SRB comprises: disabling, according to the first MAC CE and the second MAC CEs, the PDCP packet replication function of all DRBs or SRBs which are mapped on the logical channel corresponding to the target carrier and have the PDCP packet replication function enabled. <EOS>