The invention discloses a device and method for replacing scrap steel with converter flue gas reduction pellets. The structure is simple, use and operation are convenient, the recycling efficiency ofconverter flue gas sensible heat and CO can be improved, and the using range of the converter flue gas sensible heat and CO can be widened; the scrap steel is replaced with the reduction pellets, andthe fed material cost of a converter can be reduced; through high-temperature online feeding of the pellets, the feeding amount can be increased, and the cost can be further reduced; and the quality and components of the metallized pellets are stable, and therefore the production process is convenient to stably control.