Vetiver essential oil is widely used as an additive in high-quality spices and food compound spices, and is an expensive spice oil. Xianggen oil is a natural spice allowed by the state to be added to food. Vetiver grass has been widely used in ecological environment management, but so far, there has been little research on its deep processing and application as a food additive, and the extraction and chemical composition analysis of vetiver oil are almost blank.