A data transmission method, comprising: detecting, by a source Station, STA, having data to be sent, that a radio channel is busy and a physical frame header part of a radio frame is successfully received in a back-off process; determining, by the source STA, that a medium currently carrying wireless transmission can be multiplexed according to receiver Identification, ID, information carried in the received physical frame header part of the radio frame, and competing, by the source STA, for a multiplexing transmission opportunity; and sending, by the source STA, a radio frame to a destination STA after acquiring the multiplexing transmission opportunity; characterized in that: wherein determining, by the source STA, that a medium currently carrying wireless transmission can be multiplexed according to receiver ID information carried in the received physical frame header part of the radio frame comprises: detecting, by the source STA, that a receiver of the radio frame is not in a surrounding STA information list of the source STA; sending, by the source STA, a multiplexing transmission request frame carrying the receiver ID information to the destination STA; and receiving a multiplexing transmission response frame when the receiver of the radio frame is not in a surrounding STA information list of the destination STA; sending, by the source STA, a radio frame to a destination STA comprises: sending the radio frame carrying data to the destination STA. detecting, by a source Station, STA, having data to be sent, that a radio channel is busy and a physical frame header part of a radio frame is successfully received in a back-off process; determining, by the source STA, that a medium currently carrying wireless transmission can be multiplexed according to receiver Identification, ID, information carried in the received physical frame header part of the radio frame, and competing, by the source STA, for a multiplexing transmission opportunity; and sending, by the source STA, a radio frame to a destination STA after acquiring the multiplexing transmission opportunity; characterized in that: wherein determining, by the source STA, that a medium currently carrying wireless transmission can be multiplexed according to receiver ID information carried in the received physical frame header part of the radio frame comprises: detecting, by the source STA, that a receiver of the radio frame is not in a surrounding STA information list of the source STA; sending, by the source STA, a multiplexing transmission request frame carrying the receiver ID information to the destination STA; and receiving a multiplexing transmission response frame when the receiver of the radio frame is not in a surrounding STA information list of the destination STA; sending, by the source STA, a radio frame to a destination STA comprises: sending the radio frame carrying data to the destination STA. wherein determining, by the source STA, that a medium currently carrying wireless transmission can be multiplexed according to receiver ID information carried in the received physical frame header part of the radio frame comprises: detecting, by the source STA, that a receiver of the radio frame is not in a surrounding STA information list of the source STA; sending, by the source STA, a multiplexing transmission request frame carrying the receiver ID information to the destination STA; and receiving a multiplexing transmission response frame when the receiver of the radio frame is not in a surrounding STA information list of the destination STA; detecting, by the source STA, that a receiver of the radio frame is not in a surrounding STA information list of the source STA; sending, by the source STA, a multiplexing transmission request frame carrying the receiver ID information to the destination STA; and receiving a multiplexing transmission response frame when the receiver of the radio frame is not in a surrounding STA information list of the destination STA; sending, by the source STA, a radio frame to a destination STA comprises: sending the radio frame carrying data to the destination STA.