The invention discloses a date plum persimmon leaf green tea and a preparation method thereof. Date plum persimmon leaves are used as main raw materials, no additives are added, and the problem in preparing a green tea with the date plum persimmon leaves is solved. The date plum persimmon leaf green tea is characterized by being refined through the following technologies of selecting pollution-free quality fresh date plum persimmon leaves in superior ecological environment as raw materials, at appropriate environmental temperature and appropriate time, cooling the fresh date plum persimmon leaves for the first time, shaking the cooled date plum persimmon leaves for the first time, cooling the shaken date plum persimmon leaves for the second time, performing fixation on the cooled date plum persimmon leaves, rolling the date plum persimmon leaves after the fixation, packed rolling the rolled date plum persimmon leaves, baking the date plum persimmon leaves subjected to packed rolling for enhancing aroma and removing bitter, classifying the baked date plum persimmon leaves, packaging the classified date plum persimmon leaves, and the like. The date plum persimmon leaf green tea has the beneficial efficacies of invigorating the spleen and the stomach, replenishing qi, nourishing the stomach, invigorating the spleen, nourishing blood, invigorating the mind, moistening the heart and the lung, harmonizing nutrient and defense, promoting salivation, brightening skin color, dredging nine orifices, benefitting twelve regular meridians, removing herbal toxicity, harmonizing various medicines, improving the immunity of human bodies, promoting the generation of leucocyte, reducing serum cholesterol, increasing serum albumin, protecting the liver, and even enabling cancer cells to be transformed into normal cells; besides, the date plum persimmon leaf green tea is natural and pure in mouth feel, and has an enormous health care value and market prospects.