The invention provides a detachable carton. Side wall carton plates and a bottom end carton plate are connected through protective corners; a carton cover is arranged at the top ends of the side wall carton plates; a transverse fixing piece and a longitudinal fixing piece are arranged on each protective corner body through fixed holes; a buffer structure is arranged on the outer side of the side edge of each outer layer structure; a connecting piece is arranged on the inner side of each outer layer structure, and is connected with the bottom end of an inner layer structure; the side edge of each outer layer structure, the side edge of the corresponding inner layer structure and the corresponding connecting piece form a first U-shaped cavity; the bottom edge of each outer layer structure, the bottom edge of the corresponding inner layer structure and the corresponding connecting piece form a second U-shaped cavity; fixed holes are respectively formed in two sides of each of the first U-shaped cavities and the second U-shaped cavities; each longitudinal fixing piece and each transverse fixing piece both include fixed rods, left side clamps and right side clamps; external threads are arranged at two ends of the fixed rods; and the left side clamps and the right side clamps are movably connected with the fixed rods. The detachable carton is convenient for disassembly, is easy to store in a non-use state, and is smaller in floor area after being stored.