Square and round buckle formwork system of large-size reinforced concrete column

The utility model discloses a square and round buckle formwork system of a large-size reinforced concrete column. The square and round buckle formwork system comprises a formwork (1), a vertical wooden ridge (2), a positioning wooden board (3), a transverse steel beam (4), a wedge-shaped steel plate (5) and an anti-loosening device (6). The transverse steel beams are connected in an end-to-end mode and fixed to the outer sides of the vertical wooden ridges in a surrounding mode, that is, the adjacent transverse steel beams are connected in an end-to-end mode to form square and round buckles, the positioning wood plates are connected with the transverse steel beams in a matched and clamped mode, specifically, the four positioning wood plates are connected with the four transverse steel beams forming the square and round buckle hoops in a matched and clamped mode, and stability and reliability are achieved. Four-side positioning of the square-round buckle is facilitated, construction of operators is convenient,