“Mu mi” is a type of fragrant tree. Also known as honey fragrance, wood fragrance and other names in ancient books. And there are four major regions in the growth area of “Mu mi”. It often used in conjunction with “sandalwood”, and has significant importance in Buddhist activities. However, upon examination of Chinese Buddhist scriptures, it was found that the writing of “mi (櫁)” has various forms of variant script. This article integrates relevant variant texts in Buddhist scriptures, examining the use of characters in Buddhist scriptures from three perspectives: diachronic, synchronic, and edition. It explores the use of characters for the name of the “mu mi” tree and the relationships between various variant texts.