C-shaped steel is flat and square, and can be directly cold-rolled or cut with a wide steel chain. C-shaped steel is automatically processed by a C-shaped steel forming machine. The forming process of CC section steel can be automatically executed according to the given C section steel specification. C-shaped steel is divided by thickness, thin C-shaped steel is 4mm (ultra-thin is 0.2mm), thick C-shaped steel is 4-60mm, and extra-thick C-shaped steel is 60-115mm. C-shaped steel is divided into hot rolling and cold rolling according to cold rolling.