The invention provides a dynamic distribution method for a radio local area network uplink bandwidth and is applied to a radio local area network of an infrastructure mode formed by QAP and a plurality of QATAs. The method comprises: distributing, for all the QATAs, fixed bandwidths used for sending a voice service, distributing a bandwidth application value of a video detection service of each QSTA and ensuring a relative small one of the bandwidths; determining the finally distributed bandwidth of the video service of each QSTA through a primary distribution step and a secondary distribution step; and averagely distributing the residual bandwidth of the system uplink available bandwidth to the QSTA applying for the service. According to the method of the invention, the invention not only provides a QoS guarantee for the service, but also can ensure the justification of each QSTA.