Preparation method of white spirit having low degree of drunkenness

The invention discloses a preparation method of a white spirit having low degree of drunkenness. The preparation method comprises the steps of adding L-theanine to the white spirit, and mixing evenly to obtain the white spirit having a low degree of drunkenness; the content of the L-theanine in the white spirit having a low degree of drunkenness is 0.5-20g/L. The white spirit having a low degree of drunkenness prepared by the method has the characteristics of reduced degree of drunkenness and improved quality of white spirit.