Fabricated shear wall building structure and construction method thereof

The invention relates to the field of fabricated shear wall structures, in particular to a fabricated shear wall building structure which comprises a first wall body, a second wall body and a plurality of connecting columns. A plurality of first positioning holes are formed in the first wall body, and a plurality of second positioning holes are formed in the second wall body; one ends of the plurality of connecting columns are respectively arranged in the plurality of first positioning holes in a penetrating manner, and the other ends of the plurality of connecting columns are respectively arranged in the plurality of second positioning holes in a penetrating manner; an anti-falling groove is formed in the bottom of the first positioning hole; a plurality of anti-falling blocks are arranged at one end of the connecting column in a sliding mode, a driving assembly is arranged in the connecting column, and the driving assembly is used for driving the multiple anti-falling blocks to slide in the direction close