Pipe bending die for thin-wall welded pipe

The utility model discloses a pipe bending die of a thin-wall welded pipe, which comprises a bending die and a clamping block, the bending die is provided with an insert, the clamping block is provided with a protruding part, the insert is provided with a concave part, and the protruding part can be inserted into the concave part; the clamping block and the insert can clamp a pipe fitting to be machined in the insertion direction. One end face of the protruding part and one side wall of the concave part clamp a pipe fitting to be machined in the first direction perpendicular to the insertion direction. A first inclined face is formed on the other end face of the protruding part, a second inclined face is formed on the other side wall of the concave part, and the first inclined face and thesecond inclined face can be matched to provide clamping force for clamping the pipe fitting to be machined in the first direction. According to the pipe bending die for the thin-wall welded pipe, theprotruding part of the cl