Loose-leaf binding stock book form

The utility model relates to a loose-leaf binding stock book form which comprises a front cover, a back cover and loose leaves of the stock book form. The utility model also comprises a binding screw which is composed of a lower screw, a thickening screw and an upper screw. The thickening screw is arranged on the upper end of the lower screw, and the upper screw is connected with the thickening screw. After connected, the lower screw and the thickening screw pass through a binding hole of the back cover to pass through binding holes on the loose leaves on the stock book, and then the lower screw and the thickening screw pass out of binding holes on one side cover and the front cover to be connected with the upper screw. The utility model has the advantages that the page number can be changed randomly, the structure is simple, the binding is firm, etc.