Library book placing device

A library book placing device comprises an inserting part, a pushing channel, a temporary storage area and a pushing part. The inserting part comprises two inserting pieces; when the inserting piecesare closed with each other, the front ends of the inserting parts are thinner, so that the inserting parts can be conveniently inserted into gaps among books; when the insertion parts are inserted into the gaps, the insertion pieces can be separated from each other to reserve proper vacancies. And the pushing channel is connected with the rear end of the insertion part, and the width of the pushing channel can be correspondingly adjusted according to the thickness of the book, so that the book enters the vacancy reserved by the insertion part in a proper posture. And the temporary storage areais connected with the pushing channel. The pushing part is connected with the temporary storage area and used for pushing the books in the temporary storage area into the vacancy reserved by the inserting part through the pus