The invention discloses a stacking robot grabbing device for bagged cargoes. The device comprises a robot body and a mechanical clamping jaw arranged at the tail end of the robot body, and is characterized in that the mechanical clamping jaw comprises fixing frames, supporting plates, telescopic rod bases, guide rods, telescopic rod pieces, springs, mounting blocks, rope sets, elastic plates and pulleys, wherein the supporting plates are arranged on the front portions of the fixing frames, the elastic plates are arranged on the front portions of the supporting plates, the springs are arrangedbetween the supporting plates and the elastic plates, the guide rods are further arranged on the supporting plates, the guide rods are provided with through holes, and the rope sets are fixed on the elastic plates through the through holes. According to the device, stacking automation is realized, the stacking efficiency is improved, the logistics speed is increased, the labor cost is reduced, thewaste of materials is reduced, so that the economic benefits of enterprises can be improved; and a self-adaptive structure is adopted for realizing grabbing of the bagged cargoes, and the control issimple and convenient.