The invention discloses a book cabinet with a movable partition plate. The book cabinet consists of a top plate, a bottom plate, two side plates and the partition plate which is arranged between the two side plates, wherein, the bottom plate and the top plate are respectively positioned on the bottom end and the top of the two side plates; the two side plates are respectively equipped with chutes along the length direction; a screw is arranged in each chute; and the partition plate is erected on the screws through supporting rods, and a shaft sleeve is respectively arranged on two ends of each supporting rod and is connected on each screw through threads. The book cabinet with the movable partition plate has the beneficial effects that the operation procedure is simple, convenient and fast; the interlayer height of the partition plate of the book cabinet can be changed by adopting a simple device so as to lower the production cost and save a large amount of manpower and material resource during the transportation process; and the book cabinet can be quickly assembled and disassembled on site so as to facilitate storage and reach high space utilization ratio.