An information transmission method, comprising: receiving, by a terminal device, a radio resource control, RRC, signaling sent by a network device, wherein the RRC signaling indicates configuration information of multiple pieces of configuration information for the network device to send a downlink data channel; receiving, by the terminal device, a physical downlink control channel, PDCCH, sent by the network device, wherein indication information comprised in the PDCCH indicates a number for a transmitting beam corresponding to the downlink data channel in the configuration information of the multiple pieces of configuration information for the network device to send the downlink data channel, and each piece of the multiple pieces of configuration information comprises at least one of: information of at least one transmitting beam, information of a receiving beam corresponding to the at least one transmitting beam, and resource mapping information, wherein the resource mapping information indicates a resource available or unavailable for downlink transmission; determining, by the terminal device, a receiving beam corresponding to the downlink data channel according to the indication information; and receiving, by the terminal device, the downlink data channel through the receiving beam corresponding to the downlink data channel; wherein each piece of configuration information of the multiple pieces of configuration information corresponds to one beam group, and a beam group where a beam for transmitting the PDCCH is located and a beam group where a beam for transmitting the downlink data channel is located are the same beam group or different beam groups in beam groups corresponding to the multiple pieces of configuration information. receiving, by a terminal device, a radio resource control, RRC, signaling sent by a network device, wherein the RRC signaling indicates configuration information of multiple pieces of configuration information for the network device to send a downlink data channel; receiving, by the terminal device, a physical downlink control channel, PDCCH, sent by the network device, wherein indication information comprised in the PDCCH indicates a number for a transmitting beam corresponding to the downlink data channel in the configuration information of the multiple pieces of configuration information for the network device to send the downlink data channel, and each piece of the multiple pieces of configuration information comprises at least one of: information of at least one transmitting beam, information of a receiving beam corresponding to the at least one transmitting beam, and resource mapping information, wherein the resource mapping information indicates a resource available or unavailable for downlink transmission; determining, by the terminal device, a receiving beam corresponding to the downlink data channel according to the indication information; and receiving, by the terminal device, the downlink data channel through the receiving beam corresponding to the downlink data channel; wherein each piece of configuration information of the multiple pieces of configuration information corresponds to one beam group, and a beam group where a beam for transmitting the PDCCH is located and a beam group where a beam for transmitting the downlink data channel is located are the same beam group or different beam groups in beam groups corresponding to the multiple pieces of configuration information.