The present invention relates to the field of wireless communications, and in particular, to a multiuser access method and apparatus. The method is: broadcasting, by an AP, a first trigger frame to a STA within coverage of the AP, where the first trigger frame carries a preset condition, to request a STA that meets the preset condition to send an uplink access signal in a specified time after receiving the first trigger frame; receiving, by the AP, an uplink access signal sent by at least one STA, where the uplink access signal includes an identifier sequence; and when determining that an identifier sequence included in a received uplink access signal is the same as an identifier sequence included in a resource group allocated by the AP to a STA that sends the uplink access signal, determining, by the AP, that the STA that sends the uplink access signal meets the preset condition. Therefore, uplink resource use efficiency is effectively improved.