In Turfan of Ming Dynasty, there were two very significant figures: Turfan Sultan Ali and Yunus Khan. The former, in Chinese materials, was one of the ruler of Turfan and under his domination, Turfan occupied Hami for the first time. Afterwards, although Ming Dynasty recovered Hami for several times, Turfan still occupied Hami repeatedly until Ming Dynasty abandoned Hami eventually. contrarily, Yunus Khan was more recorded by non-Chinese materials, especially "A History of the Moghuls - Tarikh-i-Rashidi." Nowadays, many scholars viewed the two person as the same one. But, in fact, there were so many contradictions between those two persons. This paper discovered Yunus`s activity territories described by A History of the Moghuls - Tarikh-i-Rashidi, and then clarified that which Yunus in Chinese materials was the one in A History of the Moghuls - Tarikh-i-Rashidi and which was not. By comparing the materials, this paper found that Sultan Ali`s activity territories were not Yunus Khan`s, so they could not be the same person. However, there was a problem could not be avoid that the son of Ali and the son of Yunus was such the same one in the materials. Also by comparing materials, this paper found that Yunus Khan would be another person in Chinese materirals whose name was "Yixi Sultan Ali" and the later could not be Turfan Sultan Ali. Through analyzing the relationship between "Turfan Sultan Ali", "Yunus Khan" and "Yixi Sultan Ali", this paper believed that Yunus Khan was not Turfan Sultan Ali but Yixi Sultan Ali. Because Ming Dynasty thought Turfan Sultan Ali as Yixi Sultan Ali and regarded "Sultan Ahmed" as the son of Turfan Sultan Ali incorrectly. and then, modern scholars misread Turfan Sultan Ali as Yunus Khan.