The invention discloses a novel rectifying tower internal part, which comprises a sieve plate and a sieve net, and further comprises a connecting sleeve. Sliding rods are inserted in the two ends of the connecting sleeve correspondingly, and a communicating groove extending in the axis direction of the connecting sleeve is formed in the outer wall of the connecting sleeve; a fixed block is fixed to the middle of the inner wall of the connecting sleeve, and one end of a rotating screw is rotationally connected with the fixed block; an adjusting nut sleeves the rotating screw and is in threadedconnection with the rotating screw; the ends, close to the fixed block, of the sliding rods are connected with connecting rods correspondingly, one ends of the connecting rods are hinged to the sliding rods, and the other ends of the connecting rods are hinged to the adjusting nut; limiting plates are fixed to the ends, away from the fixed block, of the sliding rods, and connecting grooves are formed in the sieve plate and the sieve net correspondingly; and one of the limiting plates penetrates through the connecting groove in the sieve plate and then fixes the sieve plate and the connecting sleeve, and the other limiting plate penetrates through the connecting groove in the sieve net and then fixes the sieve net and the connecting sleeve. The sieve plate and the sieve net can be conveniently connected.