Abstract: Cao Zhi was an important writer in the Wei and Jin Dynasties.His special life experience made his works good at writing melancholy.Cao Zhis works,through the creation and change of images,gave a detailed and touching description of this kind of melancholy,and created works such as Luo Shen Fu and Zeng Baimawang Biao.Cao Zhi skillfully combined this kind of melancholy with image construction,and created a highly generalized image type by means of Bixing.Cao Zhis late poems and Fu also showed a carefree and free mind to get rid of melancholy,thus opening the beginning of Zhengshi literature.

Key words: Cao Zhi, melancholy type, the release of sorrow, image creation