A relay transmission method, comprising: receiving, by a first relay node, first information, wherein the first information comprises information about a second resource of a second relay node; sending, by the first relay node, second information to a terminal, wherein the second information comprises the information about the second resource and information about a first resource of the first relay node; receiving, by the terminal, the second information from the first relay node; and sending, by the terminal, a message to the second relay node based on signals received from the first resource and the second resource, wherein the message is used to carry information about a part of the second resource, wherein the first resource comprises at least one of: a synchronization signal block, SSB, resource, a channel state information-reference signal, CSI-RS, resource, a physical random access channel, PRACH, resource, a physical uplink control, PUCCH, resource, and a preamble sequence that are used for transmission between the first relay node and the terminal; and the second resource comprises at least one of the SSB resource, the CSI-RS resource, the PRACH resource, the PUCCH resource, and the preamble sequence that are used for transmission between the second relay node and the terminal, wherein the second information further comprises a beam failure trigger threshold, a maximum quantity of times of retransmission, a maximum quantity of times of power rampings, target received power, a retransmission power step, a time length of a beam failure measurement window, and a control resource set, CORESET, of a received beam failure recovery response that are of the second relay node. receiving, by a first relay node, first information, wherein the first information comprises information about a second resource of a second relay node; sending, by the first relay node, second information to a terminal, wherein the second information comprises the information about the second resource and information about a first resource of the first relay node; receiving, by the terminal, the second information from the first relay node; and sending, by the terminal, a message to the second relay node based on signals received from the first resource and the second resource, wherein the message is used to carry information about a part of the second resource, wherein the first resource comprises at least one of: a synchronization signal block, SSB, resource, a channel state information-reference signal, CSI-RS, resource, a physical random access channel, PRACH, resource, a physical uplink control, PUCCH, resource, and a preamble sequence that are used for transmission between the first relay node and the terminal; and the second resource comprises at least one of the SSB resource, the CSI-RS resource, the PRACH resource, the PUCCH resource, and the preamble sequence that are used for transmission between the second relay node and the terminal, wherein the second information further comprises a beam failure trigger threshold, a maximum quantity of times of retransmission, a maximum quantity of times of power rampings, target received power, a retransmission power step, a time length of a beam failure measurement window, and a control resource set, CORESET, of a received beam failure recovery response that are of the second relay node.