Flour sifting device

A flour sifting device (100), comprising:

• a flour accommodating basin (200) having a first flour outlet (210) at a bottom of the flour accommodating basin (200);
• a flour sifting tank located below the flour accommodating basin (200), and the flour sifting tank (300) being provided with a flour sifting trough (340) with flour sifting holes at a bottom thereof;
• a transmission device (400) adapted to drive a rotary brush shaft (310) that is set in the flour sifting tank (300) to rotate, the rotary brush shaft (310) being provided with discrete flexible brushes (316) helically distributed in space, and the rotary brush shaft (310) rotating to drive the discrete flexible brushes (316) to rotate in a direction and brush the flour sifting holes;
• a fine flour basin (600) located below the flour sifting tank (300), and fine flour in a flour mixture being sifted through the flour sifting holes of the flour sifting tank (300) being adapted to fall into the fine flour basin (600);
• and
• a coarse flour basin (610) located on a side away from the first flour outlet (210), and coarse flour, after being sifted by the flour sifting tank (300), being adapted to slide into the coarse flour basin (610) from a flour discharge passage (330) located on one side of the flour sifting tank (300).