An information transmission method, comprising: acquiring, by a first integrated access and backhaul, IAB, node, a data packet; and sending, by the first IAB node, the data packet to an IAB donor; wherein acquiring, by the first IAB node, the data packet comprises one of: receiving, by the first IAB node, the data packet sent by a user equipment, UE; or generating, by the first IAB node, the data packet; wherein sending, by the first IAB node, the data packet to the IAB donor comprises one of: sending, by the first IAB node, the data packet to the IAB donor; or sending, by the first IAB node, the data packet to a next-hop node, and forwarding, by the next-hop node, the data packet to the IAB donor; wherein after acquiring, by the first IAB node, the data packet, the method further comprises: adding, by the first IAB node, an adaptor layer header to the data packet, wherein the adaptor layer header comprises at least one of: target node information; routing path information; control plane indication information; or user plane indication information; wherein the data packet is a user plane data packet or a control plane data packet; characterized in that, the method further comprises: obtaining, by the first IAB node, configuration information, wherein the configuration information comprises at least one of: target node information; next-hop node information; or routing path information; and determining, by the first IAB node according to the configuration information, a next-hop node to which a data packet is forwarded; wherein obtaining, by the first IAB node, the configuration information comprises: obtaining, by the first IAB node, the configuration information from a centralized unit, CU, or a CU-control plane, CU-CP, through an F1 message. acquiring, by a first integrated access and backhaul, IAB, node, a data packet; and sending, by the first IAB node, the data packet to an IAB donor; wherein acquiring, by the first IAB node, the data packet comprises one of: receiving, by the first IAB node, the data packet sent by a user equipment, UE; or generating, by the first IAB node, the data packet; receiving, by the first IAB node, the data packet sent by a user equipment, UE; or generating, by the first IAB node, the data packet; wherein sending, by the first IAB node, the data packet to the IAB donor comprises one of: sending, by the first IAB node, the data packet to the IAB donor; or sending, by the first IAB node, the data packet to a next-hop node, and forwarding, by the next-hop node, the data packet to the IAB donor; sending, by the first IAB node, the data packet to the IAB donor; or sending, by the first IAB node, the data packet to a next-hop node, and forwarding, by the next-hop node, the data packet to the IAB donor; wherein after acquiring, by the first IAB node, the data packet, the method further comprises: adding, by the first IAB node, an adaptor layer header to the data packet, wherein the adaptor layer header comprises at least one of: target node information; routing path information; control plane indication information; or user plane indication information; wherein the data packet is a user plane data packet or a control plane data packet; characterized in that, the method further comprises: obtaining, by the first IAB node, configuration information, wherein the configuration information comprises at least one of: target node information; next-hop node information; or routing path information; and determining, by the first IAB node according to the configuration information, a next-hop node to which a data packet is forwarded; wherein obtaining, by the first IAB node, the configuration information comprises: obtaining, by the first IAB node, the configuration information from a centralized unit, CU, or a CU-control plane, CU-CP, through an F1 message. target node information; routing path information; control plane indication information; or user plane indication information; wherein the data packet is a user plane data packet or a control plane data packet; characterized in that, the method further comprises: obtaining, by the first IAB node, configuration information, wherein the configuration information comprises at least one of: target node information; next-hop node information; or routing path information; and determining, by the first IAB node according to the configuration information, a next-hop node to which a data packet is forwarded; wherein obtaining, by the first IAB node, the configuration information comprises: obtaining, by the first IAB node, the configuration information from a centralized unit, CU, or a CU-control plane, CU-CP, through an F1 message. obtaining, by the first IAB node, configuration information, wherein the configuration information comprises at least one of: target node information; next-hop node information; or routing path information; and determining, by the first IAB node according to the configuration information, a next-hop node to which a data packet is forwarded; wherein obtaining, by the first IAB node, the configuration information comprises: obtaining, by the first IAB node, the configuration information from a centralized unit, CU, or a CU-control plane, CU-CP, through an F1 message.