中國古代「原生性」的文學史觀，其中之一就是由劉勰《文心雕龍》所提出的「通變文學史觀」。「通變」一詞及其觀念原出《周易．繫辭傳》，乃是一種重層的宇宙觀。劉勰將「通變」觀念轉用到文學理論，在《文心雕龍》一書中，特別撰述〈通變〉一篇，結合創作、閱讀與批評、文體、文學史四種文學要素，構成繁富的理論。其中，隱涵第一序位「創作型」文學史建構的意義；而「通變文學史觀」就內含於文學家創作實踐的意識中。這個第一序位的「通變文學史觀」，可持與《文心雕龍》的〈時序〉及〈知音〉二篇所隱涵第二序位「批評型」文學史建構進行互文詮釋；從而綜合重構系統化之「通變文學史觀」的「詮釋模型」，應用於現代中文學界的《中國文學史》書寫。中文學界至今還未有學者能精密通透的詮釋《文心雕龍》的「通變」觀念。有些學者將「通變」誤解為「復古」，有些學者將「通」與「變」誤解為二元對立辯證的關係。本文從《周易．繫辭傳》開始梳理「通變」觀念，進而精密分析《文心雕龍》「通變」觀念的相關文本，確當的詮釋「常」與「變」二元對立辯證的關係；而將「通」詮釋為守「常」知「變」，「變」而不失其「常」，貫通古今以及未來的文體演變，乃是文學創作實踐完善的效果；終而重構「通變文學史觀」系統化的「詮釋模型」。

Among different types of "original" literary historiography in ancient China, one of them is the "literary historiography of tong-bian (thorough knowledge and flexible change)" proposed by Liu Xie in his Wen Xin Diao Long (The Literary Mind and the Carving of Dragons). The term "tong-bian" and its concept originated from a multilayered cosmology in the Xici of the Zhouyi (Zhou Book of Changes). Liu translated the concept of "tong-bian" to literary theory, and the complex theory, which combines four literary elements of creation, reading and criticism, genre, and literary history, was specified particularly in the chapter "Tongbian" of Wen Xin Diao Long. At the same time, such a theory also implies the significance of the first-order "Creative" construction of literary history; and the "literary historiography of tong-bian" is contained right in the consciousness of a writer's literary creation practice. This first-order "literary historiography of tong-bian" can be cross-interpreted with the second-order "Critical" construction of literary history that is implied in the two chapters of "Shixu" and "Zhiyin" in Wen Xin Diao Long; and then, a systematized "interpretation model" of the "literary historiography of tong-bian" can be comprehensively reconstructed and applied to the composition of a History of Chinese Literature for modern Chinese academia. Until now, no scholars in the Chinese academia have accurately and thoroughly interpreted the concept of "tong-bian" in Wen Xin Diao Long. Some have misapprehended "tong-bian" as "restoration of ancient ways," and some others have misunderstood "tong" and "bian" as a relationship of binary dialectical opposition. This article starts from the Xici of the Zhouyi to organize the concept of "tong-bian" and then analyzes in detail the concept of "tong-bian" in the relevant texts from Wen Xin Diao Long so as to interpret the relationship of binary opposition between "chang" (constant) and "bian" (change) correctly. Further still, by interpreting "tong" as keeping "constants" while knowing "changes" and "changes" without the loss of the "constants," we may achieve the perfect effect of literary creation practice as long as we thoroughly understand the evolution of literary genres from ancient times to the present and the future. Accordingly, we may finally reconstruct a systematized "interpretation model" of the "literary historiography of tong-bian."