A link failure report transmission method, comprising: sending (401, 503), by a terminal, a first link failure report to a second radio access network device, wherein the first link failure report is used to indicate that a link between the terminal and a first radio access network device fails, and the first radio access network device is a secondary radio access network device of a third radio access network device, wherein, the third radio access network device is a master access network device; wherein the sending, by a terminal, a first link failure report to a second radio access network device comprises: sending, by the terminal, the first link failure report to the second radio access network device when the terminal is successfully handed over from the third radio access network device to a fourth radio access network device, wherein, the fourth radio access network device is a master access network device, and a link between the terminal and the fourth radio access network device fails within a preset time interval; wherein the method further comprises: sending, by the terminal, a second link failure report to the second radio access network device, wherein the second link failure report is used to indicate that the link between the terminal and the fourth radio access network device fails; and wherein the sending, by the terminal, a second link failure report to the second radio access network device comprises: sending, by the terminal, a first message to the second radio access network device, wherein the first message comprises the first link failure report and the second link failure report. sending (401, 503), by a terminal, a first link failure report to a second radio access network device, wherein the first link failure report is used to indicate that a link between the terminal and a first radio access network device fails, and the first radio access network device is a secondary radio access network device of a third radio access network device, wherein, the third radio access network device is a master access network device; wherein the sending, by a terminal, a first link failure report to a second radio access network device comprises: sending, by the terminal, the first link failure report to the second radio access network device when the terminal is successfully handed over from the third radio access network device to a fourth radio access network device, wherein, the fourth radio access network device is a master access network device, and a link between the terminal and the fourth radio access network device fails within a preset time interval; wherein the method further comprises: sending, by the terminal, a second link failure report to the second radio access network device, wherein the second link failure report is used to indicate that the link between the terminal and the fourth radio access network device fails; and wherein the sending, by the terminal, a second link failure report to the second radio access network device comprises: sending, by the terminal, a first message to the second radio access network device, wherein the first message comprises the first link failure report and the second link failure report. sending, by the terminal, the first link failure report to the second radio access network device when the terminal is successfully handed over from the third radio access network device to a fourth radio access network device, wherein, the fourth radio access network device is a master access network device, and a link between the terminal and the fourth radio access network device fails within a preset time interval; wherein the method further comprises: sending, by the terminal, a second link failure report to the second radio access network device, wherein the second link failure report is used to indicate that the link between the terminal and the fourth radio access network device fails; and wherein the sending, by the terminal, a second link failure report to the second radio access network device comprises: sending, by the terminal, a first message to the second radio access network device, wherein the first message comprises the first link failure report and the second link failure report. sending, by the terminal, a second link failure report to the second radio access network device, wherein the second link failure report is used to indicate that the link between the terminal and the fourth radio access network device fails; and wherein the sending, by the terminal, a second link failure report to the second radio access network device comprises: sending, by the terminal, a first message to the second radio access network device, wherein the first message comprises the first link failure report and the second link failure report.