The invention discloses a preparation method for green tea wine. The preparation method comprises the following steps of S1, taking fresh tea leaves for airing, then performing enzyme deactivation, controlling the temperature of enzyme deactivation to be 290 to 310 DEG C, performing smothered enzyme deactivation for 2 to 4 minutes, then thoroughly frying the tea leaves for 3 to 5 minutes, and kneading and frying the tea leaves to obtain green tea; S2, performing temperature rise and heating on the green tea, mixing the heated green tea with sorghum for wetting and steaming materials; S3, adding distiller's yeast and yeast into first grain raw materials obtained in the S2 for fermenting large dregs; S4, adding rice hulls into the fermented large dregs, and then performing distillation and solid-liquid separation to obtain large dreg wine and second grains, wherein the large dreg wine is the green tea wine. According to the green tea wine prepared according to the scheme, the wine yield is higher, effective ingredients are retained to the maximum extent, the mouthfeel and the quality of the green tea wine are effectively improved, and the problems that the green tea medicated wine is mostly prepared by soaking, and the pharmacological function of the green tea wine is limited due to the fact that green tea medicated wine difficultly simultaneously guarantees the wine yield and effective ingredients are solved.