A reference signal sending method and apparatus, and a reference signal receiving method and apparatus are provided. The method includes: determining, by a network device, a first configuration of a first reference signal and a second configuration of a second reference signal, where the first configuration includes a first subcarrier spacing, and the second configuration includes a second subcarrier spacing; and sending, by the network device on a first subband, the first reference signal meeting the first configuration, and sending, on a second subband, the second reference signal meeting the second configuration, where a parameter configuration of the first subband is different from a parameter configuration of the second subband.