Abstract: Yuan Dynasty is a very important period in Chinese theory history,for it is the first time that country is not governed by the Han nationality.Being the ancient China's general rule of managing state affairs,the Confucianism also got the legit status at Yuan Dynasty,and passed through the period well-off.Although it is of some relations with the inherent character of the Confucianism theory,it is another not-allow factor that the Yel Chu-cai's theory and practice that the country should be governed by Confucianism.