As an eloquent master in the Warring States Period, Mencius' prose is vigorous and powerful, with sharp words, great momentum, strong feelings, meticulous thinking, rigorous logic and profound rings, with distinctive characteristics and personality of the times. Song Rucheng and Ming Dow praised the weather of Taishan Rock. Indeed, Mencius' prose is as majestic as Mount Tai and as mighty as the Yangtze River. Righteousness is witty and humorous, and righteousness is lively and vivid. His criticism of the current shortcomings is both eloquent and energetic. It can be said that it is a wonderful theory at present. We can absorb the essence and nutrition from it. Based on the excerpts from the elective course Mencius, this paper discusses the characteristics of Mencius, which can be used as a reference for argumentative writing. The structure is complete, the thinking is clear, the level is profound and the logic is strict. This is a major feature of Mencius' argument. There are various structural forms of paragraphs. In the process of argumentation, it is meaningful to present facts, and theoretical argumentation and factual argumentation complement each other. Deep reasoning, interlocking. Source: the second half of literature education