The invention discloses a preparation method for instant tea, which comprises the following steps: taking tea leaves, extracting the tea leaves by adding water, and recondensing a liquid part obtainedThe invention discloses a preparation method for instant tea, which comprises the following steps: taking tea leaves, extracting the tea leaves by adding water, and recondensing a liquid part obtainedby solid-liquid separation; adding alkali into the concentrated solution to adjust the pH value to between 8.0 and 11.5, standing the solution, and taking a liquid part through the solid-liquid separ by solid-liquid separation; adding alkali into the concentrated solution to adjust the pH value to between 8.0 and 11.5, standing the solution, and taking a liquid part through the solid-liquid separation; introducing oxygen into the liquid part for oxidation reaction; and adding acid into an oxidation reaction solution to adjust the pH value to between 5.0 and 9.5, standing the solution, takingation; introducing oxygen into the liquid part for oxidation reaction; and adding acid into an oxidation reaction solution to adjust the pH value to between 5.0 and 9.5, standing the solution, takinga liquid part through the solid-liquid separation, and drying the liquid part to obtain the instant tea. Raw materials of the instant tea can be green tea, Oolong tea or black tea, have rich sources aa liquid part through the solid-liquid separation, and drying the liquid part to obtain the instant tea. Raw materials of the instant tea can be green tea, Oolong tea or black tea, have rich sources and are easy to acquire. The preparation method adjusts the pH value through basification by adding the alkali, and then introduces the oxygen for oxidation to effectively reduce generation of macromolnd are easy to acquire. The preparation method adjusts the pH value through basification by adding the alkali, and then introduces the oxygen for oxidation to effectively reduce generation of macromolecular substances in the instant tea, prevent opacity and precipitation and improve the clarity of a tea solution and the coldcut property of instant black tea; and the prepared instant tea can be comecular substances in the instant tea, prevent opacity and precipitation and improve the clarity of a tea solution and the coldcut property of instant black tea; and the prepared instant tea can be completely dissolved into water above 5 DEG C, and the tea is clear, transparent and bright and has better mouthfeel. The preparation method has simple process and easy operation, and is suitable for indpletely dissolved into water above 5 DEG C, and the tea is clear, transparent and bright and has better mouthfeel. The preparation method has simple process and easy operation, and is suitable for industrial production.ustrial production.