The Last Lesson is based on the historical event that France was defeated in the Franco-Prussian War, and Alsace and Lorraine were ceded to Prussia after the war, which shows the pain and love of the people of Alsace province after they became foreign slaves. This is an important social theme. The author chooses to focus on a very vivid segment, that is, a French class in a primary school in Alsace. The author's choice enriches the content of Xiao, and condenses the huge theme with social significance into an event in daily life, thus raising this class to the height of bidding farewell to the motherland and making any scene and detail of this class have solemn sentiment and touching power. This technique of seeing the big from the small has an artistic effect of "four or two" when infecting readers.