The utility model belongs to a file storage device. File conveying device, the utility model relates to a file cart, in particular to a slidable baffle. The file trolley comprises a file trolley body,a plurality of file racks are evenly installed in the file trolley body in the horizontal direction at intervals, each file rack comprises a back plate and a bottom plate which form an angle of 90 degrees, a sliding groove is formed in each back plate in the extending direction of the corresponding file rack, a plurality of baffles are installed in each sliding groove in a sliding mode, and the baffles can slide and be fixed in the sliding grooves. Concave teeth are arranged on the two sides of the inner edge of the sliding groove, and protruding blocks capable of being meshed with the concave teeth are arranged at the bottom of the baffle. A pressing block is mounted at the upper end of the baffle plate; the upper end of the pressing block extends out of the surface of the baffle, the two sides of the lower end of the inner side of the baffle are respectively provided with a swing piece in a hinged mode, the upper ends of the two swing pieces make contact with the surfaces of the twosides of the lower end of the baffle, the lower ends of the two swing pieces extend towards the two opposite sides respectively to integrally form protruding blocks, and a compressed spring is installed on the same side surface between the two protruding blocks.