Adjustable square column steel formwork

The invention discloses an adjustable square column steel formwork which is characterized in that the adjustable square column steel formwork comprises a plurality of formworks, an operation platform and a perpendicularity adjusting device. At least four pieces of formworks are selected according to the size of the column cross section needing casting to form a die column, the middle portion of which is a square-column die cavity. The operation platform is arranged on the outer side of the upper end of the die column. The perpendicularity adjusting device is arranged on the outer side of the lower end of the die column and is used for supporting the die column and adjusting the perpendicularity of the die column. The plurality of formworks are combined flexibly and can form different column cross sections through splicing, so that the effect of one formwork with multiple purposes is achieved; the square column steel formwork is provided with the operation platform, thereby saving a tedious process of constructing the operation platform during concrete pouring; the square column steel formwork is provided with the perpendicularity adjusting device for adjusting the perpendicularity, thereby allowing the process to be easy to operate; and diagonal draw bars are used to bear weight, so that the process of through-wall rod hole punching and later-period hole plugging can be saved. The square column steel formwork is simple in overall structure, convenient to operate and use, and low in requirement for labor intensity and professional operating levels of workers, and can be widely applied to various building constructions.