Quantitative subpackaging device

The invention relates to the field of packaging equipment, and particularly discloses a quantitative subpackaging device which comprises a rack, a flour tank, a quantitative assembly and a filling assembly, a weighing unit is arranged at the bottom of the rack, the flour tank is fixedly connected to the upper portion of the rack, and the quantitative assembly comprises a first barrel and a first switch; the first switch is arranged on the upper portion of the first barrel, a second switch is arranged at the bottom of the first barrel, the filling and leveling assembly comprises a second barrel and a first ball, the second barrel is arranged below the first barrel, the top end of the second barrel is in a truncated cone shape, the first ball is rotationally matched with the interior of the second barrel, and the second switch is arranged at the bottom of the first barrel. A first channel is formed in the first ball body, a control rod is arranged on the flour tank, and a rotation control unit is arranged at th