Heavy-load over-descending buffer elevator

The invention discloses a heavy-load over-descending buffer elevator. The heavy-load over-descending buffer elevator comprises a car arranged in an elevator shaft, wherein a slide bar, sliding blocksand buffer rods are arranged at the bottom of the car; wedge blocks are arranged on the sides of the slide bar; the sliding blocks are arranged on the sides of the slide bar and are close to the wedgeblocks; the sliding direction of each sliding block is perpendicular to the slide bar; the two buffer rods are coaxially hinged to the bottom of the car; one ends of the two buffer rods are respectively arranged on two sides of each sliding block while buffer wheels are both arranged on the other ends of the two buffer rods; buffer blocks are arranged on the inner wall of the elevator shaft; eachbuffer block is gradually widened from top to bottom; and the two buffer wheels are respectively arranged on two sides of each buffer block. By means of the reasonable structural design, the larger gravity on the elevator is,