Starch feeding device

The utility model discloses a starch feeding device which comprises a storage box, a preparation tank, a buffer tank and a vacuum pump, the bottom of the storage box is connected with a discharge pipe, a first electromagnetic valve is arranged in the discharge pipe, the bottom of the discharge pipe is connected with a corrugated hose, the bottom end of the corrugated hose is connected with a hopper, and the top of the hopper is connected with a quantitative control assembly. A second electromagnetic valve is arranged at an outlet of the hopper, a feeding hose is connected to the outlet of the hopper, the feeding hose is connected with a preparation tank, the preparation tank is connected with a buffer tank through a connecting pipe, and the buffer tank is connected with a vacuum pump through an exhaust pipe; negative pressure generated by the vacuum pump enters the preparation tank through the buffer tank and the connecting pipe, negative pressure is generated in the preparation tank, the quantity of material