Book sleeve

The utility model discloses a book sleeve, include the book sleeve body of making by the cloth, the book sleeve body includes the bottom and sets up a folded sections and the 2nd folded sections in the bottom left and right sides respectively, a folded sections's up end left part is provided with first cloth, the upper and lower both ends and the left end of first cloth are all sewed up with a folded sections, it to supply the first cavity of one of them front cover male of books to form between a first cloth and the folded sections, the bottom top is provided with the second cloth, the upperand lower both ends of second cloth are all sewed up with the bottom, it to supply another front cover male second cavity of books to form between second cloth and the bottom, be provided with betweena folded sections and the 2nd folded sections and turn over the locking structure who is used for locking a folded sections and the 2nd folded sections after rolling over at a folded sections and the2nd folded sections, the u