精裝書是一種書的裝訂模式，配有具保護性的硬底封面（普遍采用硬紙板，外覆以織物、厚紙或小牛皮等皮革）。精裝書通常縫有富彈性的書脊，使書本翻開時也能平貼桌面，現今書脊則多采黏合制取代傳統的縫制。精裝書大多以無酸紙印制，且比平裝書耐用、久存，但成本較高、較昂貴。
Hardcover book is a book binding mode with protective hard bottom cover (generally cardboard, covered with fabric, thick paper or calf leather). Hardcover books are usually sewn with elastic spine, so that the book can be flat on the table when opened. Nowadays, the spine is mostly made of adhesive instead of traditional sewing. Hardcover books are mostly printed on acid free paper, which is more durable and long-lasting than paperback books, but the cost is higher and the price is more expensive.
精裝書普遍附有精美護封。精裝書指書籍的一種精致制作方法。精裝書籍主要是在書的封面和書芯的脊背、書角上進行各種造型加工后制成的。加工的方法和形式多種多樣，如書芯加工就有圓背（起脊或不起脊）、方背、方角和圓角等；封面加工又分整面、接面、方圓角、燙箔、壓燙花紋圖案等。

Hardcover books are generally accompanied by exquisite covers. Hardcover book refers to an exquisite method of making books. Hardcover books are mainly made after various modeling processing on the cover, spine and corner of the book block. There are many processing methods and forms, such as book block processing, such as round back (ridged or not ridged), square back, square corner and fillet, etc; Cover processing is divided into whole face, joint face, square and round corners, hot foil, hot pressing pattern, etc.
在大陸的圖書一般都是簡裝書，但是簡裝書不適合保存，精裝書就是一種美觀，易保存的圖書，具有極高的收藏價值，所以圖書收藏愛好者和圖書館都喜歡精裝書。精裝書按用料分，可分為脊面同料和脊面異料兩種。脊面同料，即書脊和封面封底采用整片的同一種材料制成。有方脊和圓脊兩種。精裝面料多用紙、織物、漆紙、漆布等，一般都配有護封。
Books in mainland China are generally paperback books, but paperback books are not suitable for preservation. Hardcover books are beautiful and easy to preserve, with high collection value, so book collectors and libraries like hardcover books. Hardcover books can be divided into ridge same material and ridge different material according to the materials used. The ridge surface is made of the same material, that is, the spine and the cover and back cover are made of the same material. There are square ridge and round ridge. Hardcover fabrics are multi-purpose paper, fabric, lacquer paper, lacquer cloth, etc., which are generally equipped with protective covers.
但有一種全紙面印有書名、圖案等并壓膜裱糊在硬紙板上，這種書多為方脊不帶護封；脊面異料，即書脊和封面用不同材料制成，通常以織物作書脊，以紙張裱糊在硬紙版上作封面，這種形式一般多為圓脊不帶護封。但是目前印刷、裝訂生產的精裝書籍存在美觀效果差、立體感效果不好、強度不高容易損壞等缺點，不能滿足對精裝書要求較高的場合。
However, there is a kind of book with the title and pattern printed on the whole paper and laminated on the cardboard. Most of these books have square ridges without protective seals; Ridge surface different materials, that is, the spine and cover are made of different materials. Usually, the fabric is used as the spine and the paper is pasted on the hard paper plate as the cover. This form is generally round ridge without protective cover. However, at present, the hardcover books produced by printing and binding have some disadvantages, such as poor aesthetic effect, poor three-dimensional effect, low strength and easy damage, which can not meet the occasions with high requirements for hardcover books.