Abstract: Ji Kang is the famous thinker of the Wei and Jin Dynasties, whose core proposition of ethical thinking is "Transcending the Confucian ethical code and being natural".But being natural needs bases of value and theoretics, so He was run through the natural by Ji Kang and named He of natural.He indicates:the world will be He as it goes naturally, and He is the ultimate purpose.And he elaborated the value of the individual and social levels, and tried to resolve the inherent tension between the individual and society, and to achieve the ideal world of individual freedom and social harmony.