As the political power changed during Wei-Jin period, the thought of naturalism was also changed. This article is trying to discuss the naturalism of Wei-Jin. During Wei-Jin there were three main different parts of it’s naturalism development. First was the Zheng-Shi period, the main trend of thought was lead by Yan He and Bi Wang. Second was the Zhu-Lin period, the main trend of thought was lead by Ji Ruan and Kang Ji. Third was the Yuan-Kang period, the main trend of thought was lead by Xiang Guo. Hoping by analysised the there different trend of thought, we can know better about the turly connotation of Wei-Jin’s naturalism.