Four-multiplying-power shear type grab bucket

The invention relates to a shear type grab bucket, in particular to a four-multiplying-power shear type grab bucket and belongs to the technical field of shear type grab buckets. The shear type grab bucket comprises an inner bucket body, a split type outer bucket body and two opening and closing steel wire ropes; the inner bucket body is rotatably connected to a center main shaft, the split type outer bucket body comprises an upper bucket valve and a lower bucket valve, the upper bucket valve and the lower bucket valve are fastened to the center main shaft through screws, and the upper bucket valve and the lower bucket valve can rotate synchronously along with the center main shaft. The upper portion of the inner bucket body and the inner side of the upper bucket valve of the split type outer bucket body are provided with an upper pulley set and a lower pulley set. The four-multiplying-power shear type grab bucket is simple in structure, compact and reasonable, and by means of the split type outer bucket body