双头州郡是东晋南北朝时代地方行政设置的特殊现象。吴应寿师曾撰有《东晋南朝的双头州郡》一文(载《历史地理研究》第一辑),概要地分析了双头州郡的类别及双头单称现象。本文试图在此基础上,进一步就东晋南朝双头州郡的概念、种类、名称、设置情况及设置原因等进行讨论。北朝的双头州郡,则另文论述。 Double-headed state county is the local administration of the Eastern Jin and Northern and Southern Dynasties set a special phenomenon. Wu Yingshou had authored the article entitled “Two-headed States in the Eastern Jin and Southern Dynasties” (the first series of “Historical Geography”), which briefly analyzed the categories of double-headed state and the double-headed monarch phenomenon. Based on this, this article attempts to discuss further the concept, category, name, setting and setting reasons of the double-headed state in the Eastern Jin and Southern Dynasties. In the Northern Dynasties, Shuangtou County was discussed separately.