The utility model relates to the field of grain grading screens, in particular to a semi-hand-woven light durable high-pressure grain grading screen which comprises a mounting frame, a connecting frame is connected to the right side of the mounting frame in a
bolting mode, mounting plates are connected to the front side and the rear side of the top of the connecting frame in a
bolting mode, and sliding rods are connected to the inner sides of the mounting plates in a
bolting mode. Through the mounting frame, the fine material screen, the coarse material screen, the air inlet
pipe, the partition plate and the like, before grains are screened, the
centrifugal fan assembly is connected with the air inlet
pipe, so that the air inlet
pipe can transmit
wind power to the upper part of the screen through the screen openings of the fine material screen and the coarse material screen, the
wind power above the fine material screen is smaller, and the fine material screen can be separated from the coarse material screen. Wizened grains can penetrate through the screen, fall to the lower portion and are discharged through the fine material discharging port, the
wind force of one side of the coarse material screen is larger than that of one side of the fine material screen, and wizened, fragile and light-specific-gravity diseased grains are pushed by the
wind force, cannot be screened from the coarse material screen and are discharged from the left side of the mounting frame.