Wireless transmission speed adjustment method

The invention discloses a wireless transmission speed adjustment method used for adjusting a wireless transmission speed of a wireless transmission device. The method comprises the steps of making the wireless transmission device enter a speed adjustment mode from a normal operation mode; transmitting a plurality of test packets according to a first modulation coding architecture, and if the transmission is done successfully based on the first modulation coding architecture, returning to the normal operation mode and transmitting data according to the first modulation coding architecture; if the transmission can not be carried out successfully, keeping in the rate adjustment mode and transmitting the plurality of testing packets according to a second modulation coding architecture, and judging whether the transmission is done successfully according to a preset condition; if the transmission is done successfully according to the second modulation coding architecture, returning to the normal operation mode and transmitting the data based on the second modulation coding architecture; and if the transmission can not be carried out successfully based on the second modulation coding architecture, returning to the normal operation mode and transmitting the data according to an original transmission rate or the first modulation coding architecture.