Practical book replacement board

The utility model relates to a practical book replacement board. The practical book replacement board comprises a main board body (1) with numbers and an auxiliary board body (2). A handle is arranged at one end of the main board body (1). The numbers are printed on the end face of one side of the main board body (1) and the portions, close to the end face, of the two sides of the end face. Arc-shaped transition is achieved at the other end of the main board body (1). A magnetic strip (4) is attached into an insertion hole in the upper end of the main board body (1). A rope (3) is hung on the auxiliary board body (2). The practical book replacement board is used in a stack of a library. Due to the fact that the handle of the main board body is clamped outside a bookshelf partition plate, the main board body can protrude out of books and a bookshelf, the numbers can be exposed outside and can be seen instantly, a reader can rapidly and accurately find the position of the main board body of the book replacement board, the reader can be prevented from placing the books at will, the books can be prevented from being placed on wrong shelves, and the books and the main board body can be prevented from being lost.