Method for performing positioning in wireless communication system, and apparatus therefor

The present specification relates to a method for performing positioning in a wireless communication system, the method being performed by a terminal, comprising the steps of: receiving, from a serving base station, assistance data including reference cell information (ReferenceCellInfo) and neighbor cell information (NeighbourCellInfo); on the basis of the received assistance data, receiving a location determination reference signal from each of a reference cell and at least one neighbor cell; measuring a reference signal time difference (RSTD) for the reference cell of the at least one neighbor cell using the received location determination reference signal; and reporting the measured RSTD to the serving base station.