Han Dynasty was the critical development period of the unified centralism of the feudal society in ancient China and the rulers of early Han Dynasty cried for a set of system of administration and stability.With the conformation to the time, Dong Zhongshu remoulded Confucianism and put forward his theoretical renovation concerning the royal political construction of“Grand Unification”, and urged the rulers to“reject all kinds of theoretical schools but Confucianism”, which made it official.Confucianism and real politics mutually influenced each other because of the opportunity of the time and Confucius theoretical qualities.Confucianism remoulded by Dong Zhongshu met the needs of the time with the new connotation and provided the social governance model for the feudal society in Han Dynasty, which united Confucianism and kingly politics together.“Rejecting all kinds of theoretical schools but Confucianism”is not only the great renovation of Confucianism, but also makes Confucianism remain in the long dominant position of ideology and also establishes rather complete value system for the feudal and royal despotism “Grand Unification”.