Seicho Matsumoto is not only in Japan but also a famous reasoning fiction writer all overthe world. His reasoning fiction is different from before detective fiction, previously themystery novels pay attention to the set of mystery, Seicho Matsumoto’s mystery novels paymore attention to explore the motive, the Seicho Matsumoto from Matsumoto social keeninsight and excavation of the essence of social issues, he was known as the social crimenovels. Seicho Matsumoto pushed Japanese mystery novels into the new era.Literature is the exposure is Matsumoto Seicho’s creative ideas. Matsumoto Seicho’s alot of works have criticized some of the common questions on the social. Matsumoto Seichodetective novels is called the the social faction detective novels. War, politics, economicsprofession, the legal profession, there is a high degree of economic growth during themammonism are all of the targets that Matsumoto Seicho’s detective novels criticed.In this dissertation the social criticism in Matsumoto Seicho’s detective novels werediscussed. This essay is divided into five parts. The first part analyzes the theme of the novelMatsumoto Seicho reasoning and writing features. The second part discusses the criticism ofthe war in Matsumoto Seicho detective novels. The third part analyze several MatsumotoSeicho of detective novels discusses the practical problems of the common social critique hisdetective novels. Expand from three areas of politics, economy and legal sectors discussed inthis part. Part IV discusses the criticism of the the whim mammonism postwar JapanMatsumoto Seicho detective novels.The last, fifth section analyzes the causes and significance of Matsumoto Seichodetective novels of social criticism. It is a deep connection with the Matsumoto Seicho’spersonal experiences and post-war Japanese society. Seicho’sreasoning novel characteristicsof social criticism, whether it is in the field of literature in the field of social reality has a verydeep meaning.