The invention discloses a construction method for a column mold composed of concrete formworks. The construction method comprises the following steps of preparing parts, wherein the concrete formworks and square pipes are provided, each concrete formwork comprises opposite pouring surfaces and opposite installation surfaces, one end of each square pipe is the nut end, each nut end is provided with a pipe nut, the other end of each square pipe is the bolt end, and each bolt end is provided with a through hole; prefabricating column mold plates, wherein the square pipes are arranged on the installation surfaces, the nut ends are located in the mode that the nut ends extend out of the outer edges of the concrete formworks by the thickness of one concrete formwork, the bolt ends extend out of the concrete formworks, and the column mold plates are prefabricated; splicing the column mold plates, wherein the multiple column mold plates are spliced to form a column pouring mold cavity, and a pipe bolt penetrates the through hole in each square pipe and then is arranged inside a pipe nut of another square pipe in a screwed mode. According to the construction method for the column mold composed of the concrete formworks, the square pipes do not need to be removed from or installed on the concrete formworks one by one, so that the column mold assembly efficiency and the demolding efficiency are improved on a construction site. Besides, the column mold plates can be prefabricated in advance on the ground, so that assembly is convenient, the altitude effect is avoided, the work difficulty is greatly lowered, and assembly precision can be improved.