A control channel transmission method, including receiving, by a first device, configuration information, where the configuration information indicates a time-frequency resource configured for a control channel, where the time-frequency resource comprises N symbols and M physical resource blocks (PRBs), where N is-greater than or equal to 1 and less than or equal to 12, where M is greater than or equal to 1, where the control channel comprises a demodulation reference signal (DMRS) and uplink control information (UCI), and where the M PRBs are contiguous or non-contiguous, and transmitting the DMRS on at least one of the N symbols using a target PRB, where the target PRB comprises at least one of the M PRBs.