A data transmission method, comprising: receiving, by an access point, a request to send, RTS, frame sent by a legacy station on a channel including a primary channel; sending, by the access point, a clear to send, CTS, frame including new station scheduling indication information to the legacy station and a new station on the channel including the primary channel, for enabling the legacy station to send data on the channel including the primary channel according to the CTS frame, and enabling the new station to send data on a secondary channel not occupied by the legacy station according to the CTS frame; and receiving, by the access point, the data on the secondary channel not occupied by the legacy station sent by the new station according to the CTS frame, wherein the new station scheduling indication information includes indication state information of an indication identifying site, the indication state information is used for indicating the new station to send or not to send the data on the secondary channel not occupied by the legacy station according to the CTS frame by using a bit indicated by the indication identifying site, information of the bit indicated by the indication identifying site relates to what action should be taken by the new station, the action to be taken includes sending or not sending the data on the secondary channel, under the condition that the legacy station sends the data on the channel including the primary channel according to the CTS frame, and the access point schedules the new station by using a reserved bit or a reusable bit in the CTS frame, wherein the bit indicated by the indication identifying site is the reserved bit or the reusable bit in the CTS frame. receiving, by an access point, a request to send, RTS, frame sent by a legacy station on a channel including a primary channel; sending, by the access point, a clear to send, CTS, frame including new station scheduling indication information to the legacy station and a new station on the channel including the primary channel, for enabling the legacy station to send data on the channel including the primary channel according to the CTS frame, and enabling the new station to send data on a secondary channel not occupied by the legacy station according to the CTS frame; and receiving, by the access point, the data on the secondary channel not occupied by the legacy station sent by the new station according to the CTS frame, wherein the new station scheduling indication information includes indication state information of an indication identifying site, the indication state information is used for indicating the new station to send or not to send the data on the secondary channel not occupied by the legacy station according to the CTS frame by using a bit indicated by the indication identifying site, information of the bit indicated by the indication identifying site relates to what action should be taken by the new station, the action to be taken includes sending or not sending the data on the secondary channel, under the condition that the legacy station sends the data on the channel including the primary channel according to the CTS frame, and the access point schedules the new station by using a reserved bit or a reusable bit in the CTS frame, wherein the bit indicated by the indication identifying site is the reserved bit or the reusable bit in the CTS frame.