The invention discloses a feeding device for adjusting heads of rotary crayons. The feeding device comprises a supplied material conveying mechanism, a positioning mechanism and an automatic feeding mechanism; the supplied material conveying mechanism comprises a supplied material mounting support, the supplied material mounting support is provided with a conveying guide rail and a material receiving plate, and the adjusting heads are transversely conveyed onto the material receiving plate by the conveying guide rail; the positioning mechanism comprises a positioning support, the positioning support is driven by a first driving mechanism to rise and fall, the top end of the front side of the positioning support is provided with a positioning baffle, and the bottom end of the front side ofthe positioning support is provided with a partition plate; and the automatic feeding mechanism comprises a mounting bottom plate capable of rising and falling, the mounting bottom plate is glidinglyprovided with a suction cup mounting support, the suction cup mounting support is driven by a third driving mechanism to slide horizontally, the rear end of the suction cup mounting support is provided with vacuum suction cups, and the adjusting heads on the material receiving plate are sucked through the vacuum suction cups and are carried onto a downstream assembly line. The feeding device disclosed by the invention has the advantage of realizing automatic suction conveying, automatic material distribution and automatic positioning of the adjusting heads.