The invention discloses a large detachable exhibition hall. The large detachable exhibition hall comprises a torsional ring beam, a bearing column, a circular upper substrate and a circular lower substrate which are detachably connected to the upper part of the bearing column, a plurality of tensile braced beams and a plurality of uplift braced beams, wherein the tensile braced beams are uniformlyarranged along the torsional ring beam. The large detachable exhibition hall further comprises a plurality of main inhaul cables, a plurality of secondary inhaul cables, a tensile membrane and a solar cell panel. The large detachable exhibition hall comprises the torsional ring beam, the bearing column, the circular upper substrate, the tensile braced beams, the uplift braced beams, the main inhaul cables, the secondary inhaul cables, the tensile membrane, the solar cell panel and the like which are connected detachably, the components are detachable, the assembling construction is convenient, the construction speed is high, and the construction cost is low. The exhibition hall can be detached after the exhibition, the problem that the standby time of a fixed exhibition hall is long is solved, and the detached exhibition hall can be constructed repeatedly for use in other needed places, so that the cost of the exhibition hall is further reduced.