Book positioning frame

The utility model discloses a book positioning frame which comprises a frame plate installed on a frame body, the top wall of the frame plate is provided with a downwards-sunken installation groove formed in the length direction of the frame plate, a sliding plate connected in a sliding mode in the length direction of the installation groove is arranged in the installation groove, and a positioning plate used for being connected with the side wall of a book in an abutting mode is installed on the top wall of the sliding plate. The positioning mechanism is used for fixing the sliding plate and the frame plate, the sliding plate is connected to the frame plate in a sliding mode, the position of the positioning plate can be changed through the sliding plate, and then the clamping device can be suitable for clamping different numbers of books; the positioning plates abut against the side walls of the books, so that the books on the outermost side can be prevented from toppling over; after the positioning plate ab