Negative pressure screen analysis device

The negative pressure screen analysis device comprises a machine body, a negative pressure screen, a screen seat, a dust collector and a beating assembly, the beating assembly comprises a special-shaped fixing block fixedly connected with the negative pressure screen, a beating block used for beating the negative pressure screen and a fluted disc rotationally arranged on the machine body, and a driving assembly for driving the fluted disc to rotate is arranged on the machine body; the beating block is in sliding connection with the fluted disc in the direction close to or away from the negative pressure screen, a driving piece for driving the beating block to move is arranged on the fluted disc, and the beating block intermittently abuts against the special-shaped fixing block. The fluted disc carries the beating block to move under the action of the driving assembly, and when the beating block abuts against the special-shaped fixing block, the beating block slides in the direction away from the negative pres