A recoiling facility for a magnesium alloy sheet is provided with: an unwinder which is able to unwind a coil material formed by winding magnesium alloy onto a fixed mandrel; a heating furnace which heats to a predetermined temperature the magnesium alloy sheet which has been unwound from the coil material; a trimmer which trims both side edges of the sheet; and a winder which rewinds the magnesium alloy sheet. According to the present invention, it is possible to rewind a coil material formed by winding a magnesium alloy sheet onto a fixed mandrel and remove the fixed mandrel, and to perform leveling and trimming on crack portions and shape defect portions in width end portions of a plate that have been generated by multi-pass rolling so as to manufacture a high-quality product coil.