Ultrahigh-space ALC plate partition wall structure and construction method thereof

The invention discloses an ultrahigh space ALC plate partition wall structure and a construction method thereof.The structure comprises a prefabricated support, a plurality of vertical columns arranged in rows and a plurality of cross beams connected between every two adjacent vertical columns and arranged in the vertical direction, and the upper ends and the lower ends of the vertical columns are connected to an upper floor slab and a lower floor slab of an ultrahigh space respectively; the isolation bearing platforms are arranged between the lower end supports of every two adjacent stand columns, the isolation bearing platforms are poured on the lower floor slab, the isolation bearing platforms are arranged under the cross beams in the length direction of the cross beams, and a plurality of installation spaces are defined by every two adjacent stand columns, the cross beams and the isolation bearing platforms; the ALC wallboard is embedded in the installation space and comprises a plurality of unit plates w