The present invention relates to a method for user equipment to perform random access in a wireless communication system and a device therefor. The present invention can provide a method and device which: select a predetermined preamble among multiple preamble sets configured according to predetermined conditions; repeatedly transmit the selected predetermined preamble to a base station via one or multiple mutually different neighboring beams; and receive, from the base station and in response to the preamble, a response message containing a temporary identifier of user equipment, wherein the selected predetermined preamble is repeatedly transmitted on resources which constitute a subframe and are distinguished according to the one or multiple mutually different beams.