Abstract: Since ancient times, the imperial edicts are in the process of continuous evolution. The imperial edicts with the name of“Chi”in Ming Dynasty have undergone great changes compared with the previous dynasty. Because there has not been too much difference in the style and administrative operation in the past, it causes confusion among the terms of“ChiYu”,“ChiShu”and“ChiMing”. Starting with literature studying, the author investigated the imperial edicts in Ming Dynasty in the name of“Chi”, trying to clarify the relationship among “ChiYu”,“ChiShu”and“ChiMing”, and to explore the law of their development in Ming Dynasty.