An information transmission method for a multi-hop network architecture, comprising: receiving (S102,S103), by a first device, a first message that is sent by a base station, wherein the first message comprises first indication information and system information, the first indication information is used to indicate whether the first device broadcasts the system information, and the first device is a first relay node, RN, of the multi-hop network architecture; broadcasting, by the first device, the system information if the first device determines, according to the first indication information, that the system information needs to be broadcast; allocating, by the first device, a first identifier of a target device to the target device in a random access process of the target device, wherein the first identifier is used to identify the target device in a cell accessed in the random access process of the target device, and the target device is a device that receives the system information; sending, by the first device, the first identifier to the base station, and forwarding a second message sent by the target device, wherein the second message is used to request to set up a radio resource control RRC connection between the base station and the target device; receiving (S111,S112), by the first device, a third message sent by the base station, wherein the third message comprises resource configuration information and second indication information, and the second indication information is used to determine the target device to which the resource configuration information is to be transmitted; and sending, by the first device, the resource configuration information to the target device if the first device determines, according to the second indication information, that the target device is not the first device, wherein the resource configuration information comprises first resource configuration information and second resource configuration information, wherein the first configuration information is used to configure at least one of a packet data convergence protocol, PDCP, layer and a service data adaptation protocol, SDAP, layer of the target device, and the second configuration information is used to configure at least one of a radio link control, RLC, layer, a media access control, MAC, layer, and a physical, PHY, layer of the target device; wherein the first resource configuration information is generated by the base station, and the second resource configuration information is generated by the base station or the first device. receiving (S102,S103), by a first device, a first message that is sent by a base station, wherein the first message comprises first indication information and system information, the first indication information is used to indicate whether the first device broadcasts the system information, and the first device is a first relay node, RN, of the multi-hop network architecture; broadcasting, by the first device, the system information if the first device determines, according to the first indication information, that the system information needs to be broadcast; allocating, by the first device, a first identifier of a target device to the target device in a random access process of the target device, wherein the first identifier is used to identify the target device in a cell accessed in the random access process of the target device, and the target device is a device that receives the system information; sending, by the first device, the first identifier to the base station, and forwarding a second message sent by the target device, wherein the second message is used to request to set up a radio resource control RRC connection between the base station and the target device; receiving (S111,S112), by the first device, a third message sent by the base station, wherein the third message comprises resource configuration information and second indication information, and the second indication information is used to determine the target device to which the resource configuration information is to be transmitted; and sending, by the first device, the resource configuration information to the target device if the first device determines, according to the second indication information, that the target device is not the first device, wherein the resource configuration information comprises first resource configuration information and second resource configuration information, wherein the first configuration information is used to configure at least one of a packet data convergence protocol, PDCP, layer and a service data adaptation protocol, SDAP, layer of the target device, and the second configuration information is used to configure at least one of a radio link control, RLC, layer, a media access control, MAC, layer, and a physical, PHY, layer of the target device; wherein the first resource configuration information is generated by the base station, and the second resource configuration information is generated by the base station or the first device.