Film can

The invention relates to a thin film tank, and belongs to the technical field of storage containers. The suspended ceiling comprises a barrel and a dome, a suspended ceiling is arranged below the dome and comprises a ceiling body and a cantilever assembly, and the ceiling body comprises an inner frame and a first suspender. The inner frame is fixed below the dome by the first suspender; an annular gap is formed between the outer edge of the inner frame and the inner side wall of the main container. The cantilever assembly comprises a fixed beam and a cantilever beam, the fixed beam is detachably connected with the inner frame, and the length direction of the fixed beam is consistent with the radial direction of the inner frame. The cantilever beam is detachably connected with the side, away from the inner frame, of the fixed beam, and the cantilever beam can rotate relative to the fixed beam. And when the cantilever beam and the fixed beam are unlocked, the cantilever beam rotates relative to the fixed beam s