"The Shadow in the Rose Garden" is one of the famous short stories written by Lawrence which narrates the seemingly harmonious but alienated state between the husband and the wife to reveal the marriage tragedy under the background of capitalist industrialization, and severely criticizes the trauma caused by war to human beings. Cooperative Principle, as a core theory in pragmatics, is put forwards by Herbert Paul Grice, an American linguist. In recent years, this theory has been increasingly applied in analyzing literature. The paper focuses on the communications between the husband and wife to analyze the characters through the flouting of four maxims in Cooperative Principle, including the maxim of quantity, quality, relation as well as manner. It is hoped that linguistic approach to "The Shadow in the Rose Garden" can provide a different angle to appreciate this novel.