The method for air interface resource allocation, including allocating a first air interface resource to a first service with a first latency sensitivity, allocating, to a second service with a second latency sensitivity that is greater than the first latency sensitivity, a second air interface resource on subcarriers of all frequency bands within a current transmission time interval (TTI); and preempting, for the second service, the first air interface resource allocated to the first service, wherein the second service has a higher priority for obtaining the first air interface resource than the first service.