The invention relates to a disk binding machine, comprising an aligning mechanism, wherein the aligning mechanism is composed of two aligning wheel sets, the two aligning wheel sets are arranged on an adjusting frame, the two aligning wheel sets are arranged in a parallel symmetric structure, seven aligning wheels are arranged on each aligning wheel set, and the seven aligning wheels are arranged in a two-row structure that three aligning wheels are arranged in the upper row and four aligning wheels are arranged in the lower row. By adopting the disk binding machine provided by the invention, the traditional backward production way that a paper winding drum is produced manually can be thoroughly changed, the labour force can be greatly saved, the labour intensity of worker can be reduced, the production efficiency of the paper winding drum is improved, and wood or metal materials are greatly saved, thus being beneficial to environmental protection.