Automatic screening device for selected sunflower seeds

The automatic screening device for the selected sunflower seeds comprises a machine body assembly, and the machine body assembly comprises a machine box, a storage hopper, an electric control box, a feeding pipe and a material collecting plate; and the fine selection control mechanism comprises a level gage, a pipe body, a fan, a first-stage screening plate and a second-stage screening plate. According to the sunflower seed screening device, sunflower seeds are preliminarily screened through the vibrating first-stage screening plate, full seeds are guided out of the machine box, then the sunflower seeds are screened again through the vibrating second-stage screening plate, small seeds are guided out of the machine box, and therefore the preliminarily screened seeds can be screened again; the screening effect is improved, then material level data of the seeds in the storage hopper are detected through the material level indicator, when the data detected by the material level indicator is lower than a threshold