The year of Sakyamuni Buddha’s nirvana was an important topic for the ancient India and Buddhist History. While it is a puzzling theme for the scholars almost all over the world for the past more than 300 years. There were many kinds of theories of the year of Buddha’s nirvana in Chinese historical records，and many Chinese scholars took part in these discussions，but few of their opinions were concerned by the European and Japanese scholars. This paper will state the main theories about Buddha’s nirvana year，including the Renshen year of King Mu of Western Zhou，“uncorrected long chronicle”，the “corrected long chronicle” and “short chronicle”，and analysis the reasonable and unreasonable of these theories which offered mainly by European and Japanese scholars，and remind to pay great attention to the opinions of other Chinese historical records and Chinese scholars. Based on the different facets considerations，it is hard to say that the “short chronicle” should no doubt to replace the “corrected long chronicle” yet.