The invention discloses a green-tea essential oil as well as a preparation method and applications thereof. The green-tea is distilled for 2 to 10h by water vapor; then a product is manufactured after the processes of condensation and oil-water separation are carried out on the green tea. The green-tea essential oil is distilled to a concentration of 0.1 to 0.5 percent by 95% ethanol and then isadded into the cigarette filaments according to 0.01 to 0.1 percent of the weight of the cigarette filaments for endowing special fragrance for the tobacco Simultaneously, free amino acids in the green-tea can better participate in a Mailard reaction during the alcoholizing and burning process of the tobacco to generate a flavor matter and can neutralize the alkaline matters in the tobacco, thereby reducing stimulation, enriching the fragrance of the cigarette, lessening the stimulation and unpurified gases as well as improving the taste and aftertaste. The technique of the invention is simple; the operation is simple and convenient; besides, the existing production technique is not needed to be changed; the product does not have a solvent pollution; therefore, the yellow-tea extract has an excellent application prospect.