Quantitative feeding device

The invention relates to the field of material conveying, and discloses a quantitative feeding device which comprises a feeding channel (1) extending in the first horizontal direction and a plurality of spiral conveying pieces (2) arranged in the feeding channel (1) and extending in the first direction, and the spiral conveying pieces (2) are arranged in the second horizontal direction perpendicular to the first direction. A main feeding port (3) is formed in the top of the first end of the feeding channel (1), a discharging port (4) is formed in the bottom of the second end of the feeding channel (1), and the size of the main feeding port (3) in the second direction is not smaller than the span of the multiple spiral conveying pieces (2) in the second direction. According to the technical scheme, the width of the conveying channel is increased, the number of the spiral conveying pieces in the conveying channel is increased, the width of the main feeding port is increased, and therefore materials can be preve