A multiuser access method, comprising: allocating, by an access point, AP, a resource group to some or to all stations, STAs, within the coverage of the AP wherein the resource group comprises an identifier sequence, broadcasting, by the access point AP, a first trigger frame within coverage of the access point, wherein 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, wherein the uplink access signal comprises an identifier sequence; and when the AP determines that an identifier sequence comprised in a received uplink access signal is the same as the identifier sequence comprised in the 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; wherein the allocating, by the AP, the resource group to the STA comprises: allocating, by the AP, an association ID to the STA, to associate with the STA; and agreeing, by the AP, with the STA on a preset first operation rule, to perform an operation on the allocated association ID, to obtain the identifier sequence comprised in the resource group allocated to the STA; and after the allocating, by the AP, an association ID to the STA, further comprising: agreeing, by the AP, with the STA on a preset second operation rule, to perform an operation on the allocated association ID, so as to obtain a subchannel comprised in the resource group allocated to the STA. allocating, by an access point, AP, a resource group to some or to all stations, STAs, within the coverage of the AP wherein the resource group comprises an identifier sequence, broadcasting, by the access point AP, a first trigger frame within coverage of the access point, wherein 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, wherein the uplink access signal comprises an identifier sequence; and when the AP determines that an identifier sequence comprised in a received uplink access signal is the same as the identifier sequence comprised in the 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; wherein the allocating, by the AP, the resource group to the STA comprises: allocating, by the AP, an association ID to the STA, to associate with the STA; and agreeing, by the AP, with the STA on a preset first operation rule, to perform an operation on the allocated association ID, to obtain the identifier sequence comprised in the resource group allocated to the STA; and after the allocating, by the AP, an association ID to the STA, further comprising: agreeing, by the AP, with the STA on a preset second operation rule, to perform an operation on the allocated association ID, so as to obtain a subchannel comprised in the resource group allocated to the STA. allocating, by the AP, an association ID to the STA, to associate with the STA; and agreeing, by the AP, with the STA on a preset first operation rule, to perform an operation on the allocated association ID, to obtain the identifier sequence comprised in the resource group allocated to the STA; and after the allocating, by the AP, an association ID to the STA, further comprising: agreeing, by the AP, with the STA on a preset second operation rule, to perform an operation on the allocated association ID, so as to obtain a subchannel comprised in the resource group allocated to the STA.