本文以南宋文言「公案故事」中的「通奸殺夫」一類為考察範疇，發現其在說話風氣影響下，一改唐及北宋作品側重「精察」之故事內容，轉而面向「世情」，對男女私通、謀殺等犯案過程詳加描述，形成「世俗化」之敘事轉向。本文並以《鬼董・陳淑》作為主要考察事例，發現其關於淫婦之書寫雖上承柳宗元〈河間傳〉，然在探討婦德墮落之課題上，卻弱化前文本「潔身自愛」之諄諄告誡，轉而將問題根由導向「偶然命觀」。而透過與〈金鰻記〉等宋人說話比較，亦可得知〈陳淑〉之世情題材、偶然命觀及「話分兩頭」之敘述方式，都有可能取材民間，沾染說話風氣。最後，本文復從庶民興趣與思維重新思索宋代文言小說「世俗化」之具體內涵，瞭解〈陳淑〉等南宋公案故事之所以能「諧於里耳」，緣於其能在既有社會秩序之框架中書寫惡行與欲望，既滿足庶民擺脫常軌之想望，又不逾越人們心中的正義底線，成為能與庶民經驗產生共鳴之作品。

This paper focus on the criminal stories about "Adultery and Husband-Murder " in the classical Chinese novelettes of Southern Song Dynasty , to find the fact that under the influence of the Shuo-Hua（說話）fashions, these stories were different from the ones in Tang and Northern Song Dynasty in the way of putting their emphasisfrom "case-scouting" to "secular situation" and beingcommitted to depict the process of adultery, murder and other criminal events.. This paper takes "Gui Dong・Chen Shu" （《鬼董．陳淑》）as the main material, pointing out that although "Chen Shu" followed the adulteress writing of Liu Zong-Yuan's " Biography of He-Jian", on the issue of women's morality-falling, it weakened the admonish of "keep nose clean" in pre-text, and then guide the root of corrupting to "accidentalism". In addition, through comparison with Sung Hua-Ben（宋話本）novels such as "Story of Golden eel " , we can know that "Chen Shu" might be drawn from the folk, dyed by the influence of the Shuo-Hua fashions in terms of secular-situation theme, accidentalism, and the narrative method of setting up another story main line. Finally, this paper examines the rise of writing evil and desire and the content of "secularization" of classical Chinese novelettes in Song Dynasty from the perspective of populace' interest and the historical context, figuring out that the genre not only satisfied the populace' wishes which get rid of the normal track, but also never exceed the bottom line of justice in heart which could resonate with the populace experience.