Abstract: Tang Poetic creation counts much for the development of Tang poetics, but the aspects were not always well-coordinated in progress. During the early stage of Tang Dynasty, poetics and poetic creation developed synchronically: poetic study was brought into line with the rapid progress of poetic creation; during the late stage the two deviated from each other: poetic study developed in an all-rounded way, while poetic creation overemphasized delicateness, elegance and exquisiteness, as a result, limited the source of subject matter and the improvement of style.

Key words: Tang Poetics；Tang poetic creation；synchronically；contrast；convergence &, divergence