Method and device for adjusting transmission rate in wireless network

The invention discloses a method and device for adjusting a transmission rate in a wireless network. The method comprises the following steps: after acquiring an aggregated data frame and a destination station corresponding to the aggregated data frame, determining an available transmission bandwidth that transmits a data frame to the destination station for the last time as a current transmissionbandwidth that transmits the aggregated data frame, and obtaining media access control MAC throughput rates corresponding to various transmission rates under spatial streams of different numbers in the current transmission bandwidth according to various transmission rates under the spatial streams of different numbers in the current transmission bandwidth and a corresponding current bit error rate; and based on the transmission rate corresponding to the maximum MAC throughput rate, determining the current transmission rate for transmitting the aggregated data frame and the number of the current spatial streams, so as