The embodiment of the invention provides a binding method for books. The method comprises that an interlayer with the corresponding thickness is selected according to the thickness of a book core, a wrapping material is pasted on the interlayer, the interlayer and the wrapping material form a suction ridge of a book, the suction ridge is arranged at the spine position of a book shell so as to replace a traditional ridge board. According to the binding method for the books, the multiple technical problems existing in traditional binding modes of round ridge and square ridge books are solved, and a new breakthrough is achieved in the technical field of book binding.