The utility model relates to the technical field of bookshelves, and discloses a book placing device which comprises a plurality of vertical frame plates, a plurality of transverse baffle plates arranged between the adjacent vertical frame plates, a frame top plate arranged at the top positions of the plurality of vertical frame plates, a separation bar arranged above the middle of the transverse baffle plates, two grooves respectively arranged on the top surfaces of the transverse baffle plates on two sides of the separation bar, a plurality of first fixing plates and second fixing plates are sequentially arranged in the grooves, first vertical plates are installed in the middles of the top faces of the first fixing plates, second vertical plates are installed in the middles of the top faces of the second fixing plates, and books are placed on the top faces of the transverse baffle plates between the adjacent first vertical plates and the adjacent second vertical plates. According to the book placing device, books are placed through the distance between the vertical plates, the books can be directly taken away when being taken, the remaining books are limited by the vertical plates, enough follow-up book placing space is always reserved, the remaining books cannot collapse, the books can be directly placed in the space position when being taken during follow-up book placing, pushing and sorting actions on the existing books are not generated, and the book placing efficiency is greatly improved. Therefore, the abrasion between the books and the bookshelf is relieved.