The invention discloses a preparation method of robinia honey pomelo tea and for effectively removing astringency. The method comprises the following steps: mixing zeolite powder and water, adding concentrated nitric acid with stirring, conducting stirring in a boiling state, conducting filtration and solid matter drying, adding citric acid, carrageenan and water, conducting uniform mixing, and conducting microwave heating, baking, drying and pulverizing to obtain a first material; cleaning pomelo and oolong tea, conducting uniform mixing, conducting air drying, sterilization and cooling, andconducting drying in a stirring state so as to obtain a second material; crushing the second material until 10-mesh, adding water for extraction, adding the first material to the extract liquid with stirring, conducting filtration, adding robinia honey, a sweetener and a stabilizer into the filtrate, and conducting uniform stirring to obtain a feed liquid; and subjecting the feed liquid to homogenization treatment and sterilization so as to obtain the robinia honey pomelo tea with astringency effectively removed. The method of the invention is simple, and the obtained robinia honey pomelo teahas a good taste, is fragrant and sweet and free from astringency of the pomelo, and has the health effects of clearing heat, moistening the lung, relieving sore, removing freckles, eliminating inflammation, expelling toxins, reducing blood pressure, reducing fat and eliminating fatigue.