A data frame sending method, comprising: receiving, by a first access point, first interference power parameters fed back by associated stations of the first access point, wherein a coverage area of the first access point overlaps a coverage area of a second access point, the first interference power parameter is used to indicate a transmission power or a transmission power reduction value of the second access point under a condition that communication between the first access point and the associated station of the first access point is not affected; receiving, by the first access point, second interference power parameters sent by the second access point, wherein the second interference power parameters are fed back by associated stations of the second access point to the second access point; wherein the second interference power parameter is used to indicate a transmission power or a transmission power reduction value of the first access point under a condition that communication between the second access point and the associated station of the second access point is not affected; if the first access point determines that a channel on which the first access point works is currently being occupied by the second access point, determining, by the first access point, to-be-scheduled stations of the first access point and transmission powers of the first access point for the to-be-scheduled stations according to the first interference power parameters, the second interference power parameters, and a transmission power of the second access point that is currently occupying the channel; sending, by the first access point, scheduling indication signaling to the to-be-scheduled stations at the determined transmission powers, and receiving scheduling indication response signaling sent by a schedulable station among the to-be-scheduled stations; and sending, by the first access point, a data frame to the schedulable station at a transmission power corresponding to the schedulable station among the determined transmission powers. receiving, by a first access point, first interference power parameters fed back by associated stations of the first access point, wherein a coverage area of the first access point overlaps a coverage area of a second access point, the first interference power parameter is used to indicate a transmission power or a transmission power reduction value of the second access point under a condition that communication between the first access point and the associated station of the first access point is not affected; receiving, by the first access point, second interference power parameters sent by the second access point, wherein the second interference power parameters are fed back by associated stations of the second access point to the second access point; wherein the second interference power parameter is used to indicate a transmission power or a transmission power reduction value of the first access point under a condition that communication between the second access point and the associated station of the second access point is not affected; if the first access point determines that a channel on which the first access point works is currently being occupied by the second access point, determining, by the first access point, to-be-scheduled stations of the first access point and transmission powers of the first access point for the to-be-scheduled stations according to the first interference power parameters, the second interference power parameters, and a transmission power of the second access point that is currently occupying the channel; sending, by the first access point, scheduling indication signaling to the to-be-scheduled stations at the determined transmission powers, and receiving scheduling indication response signaling sent by a schedulable station among the to-be-scheduled stations; and sending, by the first access point, a data frame to the schedulable station at a transmission power corresponding to the schedulable station among the determined transmission powers.