Facade corner constructional column reinforcing tool

The utility model discloses an exterior facade corner constructional column reinforcing tool which comprises an L-shaped constructional column formwork, the two sides of the L-shaped constructional column formwork are connected with masonry walls respectively, the L-shaped constructional column formwork, the masonry walls and a frame column define a pouring cavity used for pouring a constructional column, and constructional column longitudinal steel bars are arranged in the pouring cavity; the fixing device comprises a fixing ring, the fixing ring is arranged on a longitudinal steel bar of the constructional column in a sleeving mode through threads, two connecting lantern rings which are perpendicular to each other are arranged on the side wall of the fixing ring and communicate with the fixing ring, and a fixing bolt is arranged in each connecting lantern ring in a penetrating mode; one end of the fixing bolt penetrates through the connecting lantern ring through threads and abuts against the longitudinal r