The utility model provides a bobbin arranging machine for an automatic winder. The bobbin arranging machine comprises a feeding mechanism, a bobbin falling mechanism, a bobbin receiving buffer mechanism and a conveying device. The feeding mechanism comprises a feeding hopper support and a feeding hopper fixed to the top of the feeding hopper support, the feeding hopper is provided with a first guide slope close to the bobbin input side, a second guide slope is connected to the lower rear portion of the first guide slope, and the horizontal inclination angle alpha 1 of the first guide slope issmaller than the horizontal inclination angle alpha 2 of the second guide slope. A bracket adjusting device is arranged on the feeding hopper bracket; the pipe falling mechanism is located under a pipe outlet of the feeding hopper. The pipe receiving buffer mechanism is positioned at a pipe outlet of the pipe falling mechanism; the conveying device is located under the connecting pipe buffering mechanism. A conical connector is arranged above a pipe inlet of the pipe falling sliding way, and a pipe outlet of the feeding hopper is arranged in the conical connector in a sleeved mode. Compared with the prior art, the bobbin arranging machine is simple in structure and low in manufacturing and maintenance cost, the height of the feeding hopper is adjustable, and butt joint with existing automatic bobbin winders of various types is more convenient.