The invention discloses a detachable desktop file data frame, comprising one or more backboard-soleplate combination and a supporting device for supporting the backboard-soleplate combination as well as a panel. The backboard-soleplate combination comprises backboards and soleplates vertical to the backboards, the supporting device comprises a left side plate and a right side plate, a supporting beam for mounting the backboards and a supporting beam for mounting the soleplates are respectively arranged on two side plates, the supporting beam for mounting the backboards inclines backwards and has the angle alpha with the bottom side of side plate, the supporting beam for mounting the soleplates is vertical to the supporting beam for mounting the backboards, the backboards and the soleplates are fixed and connected by a sliding groove structure, the soleplates and the side plates are fixed and connected by a positioning key and a positioning hole structure, the panel and the side platesare fixed and connected by the sliding groove structure. The structure provided by the invention has simple structure, less parts amount, flexible assemble and disassemble and convenient use. The backboard-soleplate combination inclines backwards, avoiding the winding of the paper.