Abstract: Most of the researches on Chen Nan, the fourth patriarch of the Southern Lineage Daoism, focus on his Daoism thoughts, and only few on his life. This article extracts and analysis three aspects from his biography, one is that Chen Nan encountered bandits, second is that Chen Nan eats dog meat, and the third is that Chen Nan Sanshan dayidu（三山大義渡）. This article believes that the above records have true basis. This conclusion is only the author's inference from the synthesis of many documents, and is open to critism and comments.

Key words: The Southern Lineage Daoism, The Fourth Patriarch of the Southern Lineage Daoism, Biography of Chen Nan