A method for sending a DMRS is provided. A terminal determines a first sending power for sending a first DMRS on a first frequency resource is based on control information from a network device. The first frequency resource is a frequency resource corresponding to a first CDM group among frequency resources corresponding to a first symbol. The first sending power occupies at least part of a second sending power on a second frequency resource other than the first frequency resources among the frequency resources corresponding to the first symbol. The second frequency resource is not configured for sending a second DMRS. The terminal sends the first DMRS sent by the terminal on the first frequency resource based on the first sending power.