Book binding styles can be roughly divided into hardcover, paperback, thread binding, horseback riding and loose-leaf binding. The binding style of books is the appearance of various binding materials and binding techniques. When designing book binding, we should first choose which binding style to use, and then determine the way of book binding according to the characteristics of book demand. Hardcover books are characterized by hard cover, exquisite surface binding, durability and non-abrasion. Hardcover books have a strong protective effect on the book block, and the cover is slightly larger than the book block. Paperback books, also called paperback books, are usually made of relatively strong and thick soft paper. According to the person in charge of Soul Shengjing Company, a professional book publishing organization, paperback books are the first choice for most users because of their relatively simple printing and relatively low cost. Paperback can be divided into ordinary paperback and folded paperback. Thread-bound book is a binding style in which several pages are folded in half according to the middle seam, the front seal and the bottom seal are overlapped, and the right side is stitched with thread at an appropriate width. This form is called "thread packing" because it is developed from reel packing, folding packing, long forest packing, wrapping packing and butterfly packing. This style is mainly used in ancient books.