Sand screening machine

The utility model discloses a sand screening machine, which relates to the technical field of sand screening equipment, solves the problem that scrap iron impurities contained in raw materials screened by the existing sand screening machine cannot be removed in time, and comprises a machine body and a raw material outlet arranged on one side of the machine body. An adsorption assembly for adsorbing iron-containing impurities in the powdery raw materials is arranged below the raw material outlet; the adsorption assembly comprises a mounting shell, magnetic bars and an adjusting mechanism, the multiple magnetic bars are arranged, the two ends of the multiple magnetic bars are slidably connected with the two opposite sides of the mounting shell, a connecting frame is fixed to the ends, away from the machine body, of the magnetic bars, and the adjusting mechanism is mounted on the left side of the mounting shell and used for adjusting the distance between the multiple magnetic bars. Due to the fact that the adsor