Large-width profile and bending forming method thereof

The invention relates to a profile, in particular to an annular profile and a machining method thereof. The large-width section bar is bent into an arc shape, four arc-shaped large-width section bars are spliced into a circle, the large-width section bar is formed by splicing a left section bar and a right section bar which are symmetrical in structure, and the large-width section bars are connected and fixed into a circular ring through an integrated section bar decorating part and a split type section bar decorating part at the splicing position. The left section bar and the right section bar are mutually matched, spliced and connected into a large-width section bar through the T-shaped grooves and the T-shaped connecting pieces; one surface of the spliced section is flat and straight, and the other surface of the spliced section is wavy. During forming, the straight face leans against the die bending die, the wavy face leans against the explorator, the large-width profile is clamped by the die bending die