The fully automatic screw feeder is an automated device that uses a motor to drive the rotation of a screw shaft, thereby forcibly pushing and accurately metering dry bulk materials such as powders and granules. Its core features include closed conveying to prevent dust leakage, and the ability to achieve high-precision quantitative feeding through the loss-in-weight or volumetric principle. It is widely used in batching, feeding, and production line automation processes in industries such as chemical engineering, plastics, food, pharmaceuticals, and lithium batteries, and is a key equipment for realizing continuous and refined production.