Fine particle shaking table surface of the vertical reciprocating motion is realized through the crank drive mechanism. Motor through the belt drive the big belt wheel is driven by the crankshaft rotation, rocker followed to make up and down movement, downward motion of the rocker, the toggle plate promote the rear axle and reciprocating rod moves backwards, the spring is compressed. The bed surface is connected with the connecting seat and the connecting rod, so the bed surface is a backward movement, and the movement of the rocker is driven by the tension of the spring