The invention provides a DRS transmission method and device. The method comprises: a DRS is multiplexed to a channel region and is transmitted to a terminal at a non-licensed frequency band carrier of a licensed assisted access (LAA) in an LTE system, wherein the channel region at least includes a PDSCH area and a guard interval with the part of OFDM symbol length is preset at an OFDM symbol where the PDSCH area is located before DRS sending. Therefore, a problem that other base stations and carriers lose DRS transmission opportunities because of PDSCH and DRS multiplexing transmission at a certain base station or a certain carrier can be solved.