Abstract: "Chun", "Qiu", "Xia", "Re", "Dong" and "La" are the most widely used basic chroneme morphemes in ancient Chinese. Morphemes to denote four seasons in Beijing-Jilu-Lanyin mandarin or Zhongyuan-Southwestern-Jianghuai mandarin are the same, which is related closely to their own history and migration status. "Shu", "Han", "Leng" and "Qing" are probably the regional chroneme morphemes of ancient southern dialect.The seasonal word Tian has replaced Ri before today's dialect structure took shape. Among todays' dialects, words in the form of "chroneme morpheme plus component of direction-location" date back to Northern and Southern Dynasties, and it becomes more and more abundant with the development of the component of direction-location.