Pneumatic screening disc and spherical seed filtering and screening device

The invention relates to the technical field of screening, in particular to a pneumatic screening disc and a spherical seed filtering and screening device, and solves the problems that in the screening process, seeds may contract and may be clamped into filtering holes in a filtering net. Comprising a spherical seed filtering and screening machine, and a seed protection mechanism is fixedly mounted on the upper side in the spherical seed filtering and screening machine. By means of the device, in the process that seeds are poured into the device, the outer surfaces of the seeds can be covered with a lubricating liquid protection layer, friction and abrasion between the seeds and a screen, a container or other materials can be effectively reduced through the lubricating liquid protection layer, and therefore the damage risk of the seeds is reduced, and the service life of the seeds is prolonged. Meanwhile, the seeds can pass through the screen more smoothly in the screening process through the lubricant, the c