《春秋繁露·止雨》“二十一年”的记载,从版本、朔日等方面来看,存在着讹误,后人也有所误解。但这并不影响它的史料价值,它在探讨董仲舒作天人三策年代方面具有独特作用,既能与《史记》、《汉书》构成证据链,为元光元年说提供了有力支撑,又否定或限制了其他说法。同时,它又是汉代儒家著述中稀有的王国纪年资料,是诸侯王地位的标志,也是反映习惯做法、思想意识滞后于政治制度变化现象的标本。 “Spring and Autumn Fanlu rain” “twenty-one years ” records, from the version, the new moon and other aspects, there is corruption, future generations have misunderstood. However, this does not affect its historic value. It has a unique role in discussing Dong Zhongshu as the “Three Kingdoms of Heaven and Man of Heaven”, which not only can form the evidence chain with “Historical Records” and “Han Dynasty” , But also denied or limited other statements. At the same time, it is a rare record of the years of the kingdoms in the Confucian writings of the Han Dynasty. It is also a symbol of the status of princes and kings, as well as a specimen reflecting the change of the political system as a result of customary practices and ideological consciousness.