Screening machine for rice harvesting

The screening machine comprises a shell, the top of the shell is connected with a feeding port in a bolting mode, the bottom of the feeding port extends to an inner cavity of the shell, the front side and the rear side of the inner wall of the feeding port are connected with sliding ways in a bolting mode, and the interiors of the sliding ways are connected with adjusting plates in a sliding mode. The adjusting plate penetrates through the shell wall on the left side of the feeding port and extends leftwards, and tooth grooves are formed in the front side and the rear side of the adjusting plate correspondingly. The motor drives the first rotating shaft to rotate, the first rotating shaft drives the first gear to rotate, and the first gear is meshed with the tooth groove in the adjusting plate to enable the adjusting plate to adjust the opening size in the inner cavity of the feeding port, so that the problem that the feeding speed is difficult to adjust manually is solved, and the feeding speed can be adjust