The utility model relates to a bag receiving device used for an automatic bag opening machine. After the bag opening machine open a bag, the empty bag can be folded and sent out. The empty bag is in an erect state when being clamped in the bag opening machine, and a bag propping device is arranged near the center part of one side of the vertical plane of the bag. A bag pressing and sending device is arranged at the other opposite side. A top knife which can move forwards and backwards is arranged on the bag propping device, and the bag pressing and sending device is provided with press rollers arranged at the upper and the lower sides. The position for the top knife moving forwards corresponds to the position between the upper and the lower press rollers. The bag receiving device solves the defects that: because no bag opening machine is in use currently, the labor intensity of manually opening the bag is large, and the dust of the material is fly around so as to be unfavorable for the efficient line production.