In order to study the poetry with antithesis of 8 lines, this paper's point of penetration is axes of building. First to discuss the single central-axis become double central-axis, the becoming to settle a dispute about superfluous antithesis. And then to apply the horizontal axis connects with plinth, particularly we find the quality of building block is similar to poetic taste. Eventually to make the foursquare structure of poetry and pathway of building are interlocked. The conclusion of antithesis of 8 lines by Du-Fu is having solemn sense through ample practices and experiences of life.