Books rack convenient to it is categorised

The utility model relates to a books management technique field, the more specifically books rack convenient to it is categorised that says so, the cabinet sets up the left and right sides at the cabinet body, the seat is placed between two cabinets, the motor is installed in the motor mounting groove, the transmission band suit is on two runners, the top at the supporting seat is inlayed to the ball, supporting seat fixed connection is at the upper surface of the cabinet body, the top at the transmission band is connected to the conveyer belt, and the bottom face of conveyer belt contacts with the ball, the top of case fixed connection at the cabinet body is placed to books, the locking tooth is connected on two inner walls of the left and right sides in unit groove are placed to books, the hinge connection that the board was placed to books places the lower surface in unit groove at books, the board both sides were placed to books tooth and two locking teeth cooperate. With books classification place on the