A method for collaboratively constructing a column envelope profile of two flanks of a star wheel tooth includes steps of: determining a tooth width B of a star wheel according to a diameter of the star wheel and a dimension of a root circle; thereafter, geometrically representing positions and shapes of the two flanks by two base columns having parallel axes and the same diameter; wherein: the axes of the base columns are parallel with a center line of the star wheel tooth; on a section of a tooth top of the star wheel tooth, a local projection of a first base column close to a front flank is projected on a lowermost part of a projection of the front flank; and a local projection of a second base column close to a back flank is projected on an uppermost part of a projection of the back flank.