Abstract: The present invention provides a method for preparing a food fumeol, a method for preparing a food fumeol from Perilla frutescens as a raw material and application. The method for preparing a food fumeol includes: respectively preparing a single fumeol from each of n raw materials; and then, mixing at least two kinds of single fumeols to prepare the food fumeol, wherein n is a positive integer being greater than or equal to 2. According to application of the food fumeol, food is liquid smoked by using the food fumeol of the present application. The types and flavors of the food fumeol are greatly enriched, and the development of the food fumeol of different types and flavors is facilitated. A Perilla frutescens fumeol having a natural unique flavor prepared by the method for preparing the food fumeol from Perilla frutescens as the raw material contains rich flavor substances, and achieves antibacterial and antioxidant effects.