Ancient Chinese Poetics doesn’t propose the concept of “Tension” clearly,but some ideas and discussions have touched on the essence of the tension theory.This paper takes “Tension” as the point of departure to study on rhyme beauty of Ancient Chinese Poetics. This paper proposes that Ancient Chinese Poetics constructs rhyme beauty by the basic way : to coordinate between nature and artifice,to switch between “steadiness” and “change”, tomake extrinsic rhyme and intrinsic disposition complement each other,and eventually to achieve maximization of tension .