正变批评是贯穿中国美学史和文学批评史的重要原则。古代批评家在采用正变批评原则时,常运用的就是“溯源流”方法、比较批评方法以及辨体批评方法。古代学者运用正变批评原则时,常将三种方法结合起来,综合运用,从整体上把握文体的“正”与“变”。 Changing criticism is an important principle that runs through the history of Chinese aesthetics and literary criticism. Ancient critics often adopt the principle of “changeable flow” when adopting the principle of changing criticism, comparing the methods of criticism and the methods of distinguishing and criticizing. When using the principle of changing criticism, the ancient scholars often combined the three methods and applied them comprehensively to grasp the “positive” and “changing” of style.