A scheduling method includes: enabling, by a base station, first scheduling to allocate resources to first-category UE, where the base station is configured to process data on a second component carrier of the first-category UE, and a current cell of the first-category UE is a secondary cell corresponding to the secondary component carrier; and transmitting, by the base station, data of the first-category UE over an air interface according to the allocated resources, where an enabling moment of the first scheduling is a first duration ahead of an air interface transmission moment corresponding to the first scheduling, the first duration is greater than a second duration, and the second duration is a duration ahead of an air interface transmission moment corresponding to the second scheduling compared with an enabling moment of the second scheduling. A real-time requirement in a CA scenario can be met by using the method.