ABSTRACT This paper draws upon transitivity and Appraisal within Systemic Functional Linguistics to study the traumatic discourse of Nanjing Massacre in Chinese Mainland’s and Japan’s history textbooks. Through corpus analysis, this research finds that the Chinese discourse mainly uses effective process, relational process, verbal process to construe Japan’s victimizering experience and China’s victimhood, and employs negative Affect, opposite values of Judgment, negative Appreciation, Expand, Raise and Sharpen to construct a critical voice for the Japanese army and a sympathic tone for (...) the Chinese. By contrast, the Japanese discourse largely uses pseudo-effective and middle processes, mental and existential processes to cover up Japan’s victimizering experience, and employs negative Judgment, positive Appreciation, Contract and Raise to construct an almost uncritical voice for the Japanese army and the massacre. The difference in the representation and evaluation of Nanjing Massacre results from the politics of official memories in both countries. As China endeavors to strengthen its patriotic education by using Nanjing Massacre as an ideological weapon for national solidarity, Japan expedites its nationalist historiography move to recreate its normal national image by marginalizing the massacre. (shrink)