A data transmission method, including: generating data frames for more than one transmission connections, the data frame includes a duration field. In the case of the transmission connection for the data frame being of a first type, duration indicated by the duration field includes transmission duration for the data frame but does not include transmission duration for a receiving feedback information; in the case of the transmission connection for the data frame being of a second type, duration indicated by the duration field includes transmission duration for the data frame and includes transmission duration for the receiving feedback information. The first type of transmission connection is configured to transmit the data frame. The second type of transmission connection is configured to transmit the data frame and the receiving feedback information. The transmission frequency bands for different transmission connections are different, and sending the data frames using the transmission connections.