A CSI measurement method and apparatus are described. The CSI measuring includes obtaining CSI configuration information that includes first frequency-domain indication information and that is sent by a second network device, where the CSI configuration information instructs the first network device to perform a CSI measurement, and the first frequency-domain indication information indicates a frequency-domain location in which the first network device performs CSI measurement. The CSI measuring includes measuring, based on the CSI configuration information, a reference signal in the frequency-domain location indicated by the first frequency-domain indication information. The CSI measurement is sent to a network device, so that a reference signal in a specific frequency-domain location in channel bandwidth is measured.