Sorghum seed screening device

The invention discloses a sorghum seed screening device in the technical field of seed screening, which comprises a supporting table, an isolation hood for preventing stones from being thrown out is arranged at the upper end of the supporting table, a first filter funnel for storing the stones is arranged in the isolation hood, and a second filter funnel for storing full sorghum seeds is arranged in the first filter funnel. A second filtering funnel is arranged in the material throwing barrel, a third filtering funnel used for containing wizened sorghum seeds is arranged in the second filtering funnel, and a fourth filtering funnel used for containing water and weeds taken away by the water is arranged in the third filtering funnel. And the three layers of annular water curtains separately filter full sorghum seeds, stones, weeds and wizened sorghum seeds, so that one-time complete separate screening in a material throwing manner is realized, and the three layers of annular water curtains are different from a