Method and device for transmitting reference signal in wireless communication system supporting multiple antennas

The present invention relates to a method and device for transmitting a reference signal at a transmission end in a wireless communication system supporting multiple antennas. In particular, the present invention includes a step of transmitting a first reference signal related to pre-coded horizontal antenna domains and a second reference signal related to pre-coded vertical antenna domains to a reception end, wherein at least one of the pre-coded horizontal antenna domains is included in the vertical antenna domains.