A random access method, comprising: receiving, by the target evolved Node B, eNB, a handover request message sent by a source eNB, wherein the handover request message comprises a User Equipment, UE's capability information about at least two target component carriers being supported and information of the at least two target component carriers selected by the source eNB, and the at least two target component carriers selected by the source eNB are carriers to use when the UE executes random access to the target eNB; determining, by the target eNB, whether to allow the at least two target component carriers selected by the source eNB; if the at least two target component carriers selected by the source eNB are allowed, sending, by the target eNB, a handover request acknowledgement message to the source eNB, wherein the handover request acknowledgement message comprises the information about the at least two target component carriers selected by the source eNB; and if the at least two target component carriers selected by the source eNB are not allowed, configuring, by the target eNB, the at least two target component carriers to use when the UE executes random access to the target eNB and sending, by the target eNB, the handover request acknowledgement message to the source eNB, wherein the handover request acknowledgement message comprises the information about the at least two target component carriers configured; and after receiving a dedicated random access preamble sent by the UE, sending (102, 409), by the target eNB, a random access response message on at least one component carrier in the at least two target component carriers; wherein the at least two target component carriers, which are selected by the source eNB or configured, are sent by the source eNB to the UE through a handover command. receiving, by the target evolved Node B, eNB, a handover request message sent by a source eNB, wherein the handover request message comprises a User Equipment, UE's capability information about at least two target component carriers being supported and information of the at least two target component carriers selected by the source eNB, and the at least two target component carriers selected by the source eNB are carriers to use when the UE executes random access to the target eNB; determining, by the target eNB, whether to allow the at least two target component carriers selected by the source eNB; if the at least two target component carriers selected by the source eNB are allowed, sending, by the target eNB, a handover request acknowledgement message to the source eNB, wherein the handover request acknowledgement message comprises the information about the at least two target component carriers selected by the source eNB; and if the at least two target component carriers selected by the source eNB are not allowed, configuring, by the target eNB, the at least two target component carriers to use when the UE executes random access to the target eNB and sending, by the target eNB, the handover request acknowledgement message to the source eNB, wherein the handover request acknowledgement message comprises the information about the at least two target component carriers configured; and after receiving a dedicated random access preamble sent by the UE, sending (102, 409), by the target eNB, a random access response message on at least one component carrier in the at least two target component carriers; wherein the at least two target component carriers, which are selected by the source eNB or configured, are sent by the source eNB to the UE through a handover command.