Abstract: Analysis method for minimum necking deformation cross-section center stress and strain comprising: recording values for axial acting force, minimum cross-section radius, maximum limit of cross-section radius, inflection point position tangent slope of a rotational generatrix of a contour, radius of cross-section perpendicular to central axis at the inflection point position, and distance between the cross-section perpendicular to the central axis at the inflection point position and minimum cross-section at a necking bottom; and establishing a rectangular coordinate system by taking a center position of the minimum cross-section at the necking bottom as an origin, and substituting the recorded values into mathematical models of a first, second, and third principal stress at a center position of the minimum cross-section to calculate and obtain three principal stress values at the center position of the minimum cross-section, e.g.