The present invention relates to a method and apparatus for scheduling a downlink packet in a wireless communication system, which preferentially appoints a combination of a traffic flow and a physical resource block (PRB) having a low per-bit transmission power requirement during real-time traffic scheduling, and allocates the remaining PRBs to non-real-time traffic using spare transmission power. For this purpose, the downlink packet scheduling method of the present invention comprises: an operation of performing real-time traffic scheduling, which involves carrying out the process of preferentially appointing a combination of traffic flow and a PRB having the lowest per-bit transmission power requirement; a step of performing non-real-time traffic scheduling, which involves allocating remaining PRBs, which remain after the allocation to the real-time traffic, to non-real-time traffic using spare transmission power.