The utility model belongs to construction formworks and particularly relates to a section variable column hoop formwork for subway stations. The section variable column hoop formwork for subway stations solves the problems that construction processes of existing subway station stand columns of different sections are complex, construction quality cannot be controlled, formwork turnover cannot be achieved, and the next process is affected. The section variable column hoop formwork for subway stations is formed by splicing two L-shaped formwork bodies. Each L-shaped formwork body comprises an L-shaped steel panel, vertical rib channel steel and an L-shaped duplex channel steel back arris, wherein the steel panel is arranged on the inner side, the duplex channel steel back arris is arranged on the outer side, the vertically-arranged vertical rib channel steel of one row is welded between the steel panel and the duplex channel steel back arris, bolt holes are formed in the two ends of the duplex channel steel back arris, fixing bolts are arranged in the bolt holes in a penetrating mode, the fixing bolts are fixedly connected with connection press rods, and thread pull rods are arranged in the connection press rods in a penetrating mode. The thread pull rods are arranged in the connection press rods corresponding to the two L-shaped formwork bodies in the penetrating mode respectively. The two ends of each thread pull rod are fixed with an inner thread jack.