A 2-step random access method, comprising: transmitting, by a User Equipment, UE, a message A, when a 2-step random access is triggered based on a trigger event, wherein the message A carries a Cell-Radio Network Temporary Identifier, C-RNTI, of the UE; receiving, by the UE, a message B; and determining, by the UE, that a conflict of the 2-step random access is resolved, when the message B satisfies a condition corresponding to the trigger event, the method being further characterized in that: wherein the trigger event comprises: Scheduling Request, SR, transmission reaching a failure threshold, and said determining that the conflict of the 2-step random access is resolved, when the message B satisfies the condition corresponding to the trigger event comprises: determining that the conflict of the 2-step random access is resolved, when the UE detects a Physical Downlink Control Channel, PDCCH, scrambled by the C-RNTI in a detection window of the message B and the PDCCH carries an uplink scheduling grant; or wherein the trigger event comprises: an addition of time synchronization for a secondary cell, or a downlink data arrival and the UE being in an uplink out-of-synchronization state, and the PDCCH is used for scheduling downlink transmission, and said determining that the conflict of the 2-step random access is resolved, when the message B satisfies the condition corresponding to the trigger event comprises: detecting, by the UE, a Physical Downlink Control Channel, PDCCH, scrambled by the C-RNTI in a detection window of the message B; and decoding, by the UE, a third Media Access Control Protocol Data Unit, MAC PDU, based on the downlink transmission scheduled by the PDCCH, wherein the third MAC PDU comprises a fourth MAC Control Element,CE, and the fourth MAC CE carries a Time Alignment Command, TAC; and determining that the conflict of the 2-step random access is resolved. transmitting, by a User Equipment, UE, a message A, when a 2-step random access is triggered based on a trigger event, wherein the message A carries a Cell-Radio Network Temporary Identifier, C-RNTI, of the UE; receiving, by the UE, a message B; and determining, by the UE, that a conflict of the 2-step random access is resolved, when the message B satisfies a condition corresponding to the trigger event, the method being further characterized in that: wherein the trigger event comprises: Scheduling Request, SR, transmission reaching a failure threshold, and said determining that the conflict of the 2-step random access is resolved, when the message B satisfies the condition corresponding to the trigger event comprises: determining that the conflict of the 2-step random access is resolved, when the UE detects a Physical Downlink Control Channel, PDCCH, scrambled by the C-RNTI in a detection window of the message B and the PDCCH carries an uplink scheduling grant; or determining that the conflict of the 2-step random access is resolved, when the UE detects a Physical Downlink Control Channel, PDCCH, scrambled by the C-RNTI in a detection window of the message B and the PDCCH carries an uplink scheduling grant; or wherein the trigger event comprises: an addition of time synchronization for a secondary cell, or a downlink data arrival and the UE being in an uplink out-of-synchronization state, and the PDCCH is used for scheduling downlink transmission, and said determining that the conflict of the 2-step random access is resolved, when the message B satisfies the condition corresponding to the trigger event comprises: detecting, by the UE, a Physical Downlink Control Channel, PDCCH, scrambled by the C-RNTI in a detection window of the message B; and decoding, by the UE, a third Media Access Control Protocol Data Unit, MAC PDU, based on the downlink transmission scheduled by the PDCCH, wherein the third MAC PDU comprises a fourth MAC Control Element,CE, and the fourth MAC CE carries a Time Alignment Command, TAC; and determining that the conflict of the 2-step random access is resolved. and decoding, by the UE, a third Media Access Control Protocol Data Unit, MAC PDU, based on the downlink transmission scheduled by the PDCCH, wherein the third MAC PDU comprises a fourth MAC Control Element,CE, and the fourth MAC CE carries a Time Alignment Command, TAC; and determining that the conflict of the 2-step random access is resolved.