The utility model discloses a limestone waste treatment device which comprises a spiral stone washing machine, a stone storage bin, a feeding machine, a vertical composite crusher, a ball mill, a vibrating screen, an ash storage bin and a gas burning lime kiln which are sequentially connected through a conveying belt, a drying module is further arranged on the conveying belt between the spiral stone washing machine and the stone storage bin, and the drying module comprises an air blower arranged above the conveying belt and a stone turning device arranged below the conveying belt; the stone turning device comprises a center roller body and a plurality of jacking pieces evenly arranged in the circumferential direction of the cross section of the center roller body. According to the utilitymodel, the stone turning device arranged below the conveying belt is applied; the conveying belt is regularly jacked up through the jacking piece, limestone raw stone on the conveying belt is forced to move and turn over, it is guaranteed that the limestone raw stone on the bottom layer can also be blown dry by air blown out by the air blower, the limestone raw stone is prevented from being mixedwith water drops to enter subsequent equipment, and stable and normal operation of the subsequent equipment is facilitated.