Spiral steel pipe forming device and method for adjusting shape of inner supporting roller of spiral steel pipe forming device

The invention relates to a spiral steel pipe former and an inner supporting roller shape adjusting method thereof, and relates to the technical field of spiral welded pipe manufacturing, the spiral steel pipe former comprises a base table and a forming machine arranged on the base table, a steel pipe blank is arranged in the forming machine, and a shape adjusting device is arranged on the base table located on one side of the forming machine; the shape adjusting device comprises an assembly column vertically arranged on the base table in a limiting and sliding mode, and an L-shaped rod base is installed on the assembly column in an up-and-down limiting and sliding mode through a square inserting block. An inner supporting mechanism is arranged on the L-shaped rod base, and limiting assemblies for locking the height of the L-shaped rod base are arranged on the assembling column and the square inserting block. The supporting device has the effects that the supporting device can be matched with a forming machine