The invention provides an air collector. The air collector comprises an inner nozzle and an outer nozzle, wherein the inner nozzle and the outer nozzle adopt rotary body structures; the outer nozzle comprises an outer nozzle air outlet hole in the front end, an outer nozzle air inlet hole in the back end, and a side air hole formed in the side surface; the inner nozzle comprises an inner nozzle air outlet hole and an inner nozzle air inlet hole; the inner nozzle is embedded into the outer nozzle through the outer nozzle air inlet hole, and the outer wall of the inner nozzle is tightly adheredto the inner wall of the outer nozzle, so that the outer nozzle also sucks air through the inner nozzle air inlet hole, and the inner nozzle air outlet hole and the outer nozzle air outlet hole are coaxial and co-directional; the two nozzles are nested to form an air cavity and the side air hole is communicated with the air cavity, so that the low-pressure air sucked from the side air hole reachesthe outer nozzle air outlet hole through the air cavity. The air collector achieves the effect of collecting fiber bundles by the air and is convenient to machine and produce, and a drafting system using the air collector has the better yarn-forming quality.