Abstract: This invention discloses a binding device for binding machines and a punching and binding integrative machine. The binding device includes a base fixing plate, a support arranged on the said base fixing plate, a pushing block arranged on the said support, and a clip holder arranged on the said base fixing plate and a mounting slot arranged on the said clip holder to accommodate binding clips. The pushing block is equipped with a binding clip press-in slot in a position corresponding to the said mounting slot, and a size deviation compensation device adapted to different specifications of binding clips. The invention is equipped with a size deviation compensation device.