The invention relates to a cutting device, in particular to a rare earth ore rapid cutting device. The technical problem to be solved by the present invention is to provide a rare earth ore rapid cutting device with high cutting efficiency. In order to solve the above technical problems, the present invention provides such a rapid rare earth ore cutting device, which includes a box body, a fourth slide rail, a first slide block, a rotating motor, a gear, a fifth slide block, a rack, a third elastic Components, the first cutting knife, the placement frame, the second cutting knife, the third cutting knife, the first connecting rod, the second sliding block, the second sliding rail and the third sliding block, etc.; the bottom of the box is arranged in sequence from left to right There are a second elastic element, a third slide rail, a second slide rail, a first slide rail and a first elastic element. The invention achieves the effects of time-saving and labor-saving rare earth ore cutting, simple operation, high device strength and long service life of the device, and also because of the arrangement of reinforcing ribs.