Abstract:Levilactobacillus brevis is a common species of lactic acid bacteria mainly detected on the surface of plant stems and leaves and in pickles, dairy products, and intestines. With excellent physiological functions, L. brevis is a potential probiotic species. With the rise of genomics, it is of great significance to reveal the genetic characteristics and functional gene properties of L. brevis at the gene level for application of this bacterium. This paper reviews the genetic background and major functional genes of L. brevis, aiming to lay a theoretical foundation for the application of L. brevis.