The invention discloses a wireless local area network access method based on bye dispatching. The method comprises the following steps: when users attempt to access a wireless channel, appropriate priorities are selected to access according to the service QoS requirements of the users, the users with high priority execute bye dispatching in the first round of a competition, and the users with low priority instantly begin the competition in the first round of the competition; winners in the previous round of the competition enter the next round to continuously participate the competition until the winners are eliminated or continuously win out to reach the maximum round of the competition, the eliminated users directly quilt the competition elimination process, and final winners access the channel. The method effectively solves the problem that a large amount of users are accessed in a wireless local area network during the competition elimination process with multiple rounds, and higher probability to access the channel successfully by the users with high priority is guaranteed through a bye dispatching method; moreover, the fairness among the users with equal priority is also guaranteed.