The invention relates to the technical field of effervescent tablet preparation, and discloses tea polyphenol effervescent tablets. The tea polyphenol effervescent tablets are composed of acid granules, alkaline granules and a lubricant, wherein the acid granules comprise, by weight, 8-12 parts of tea polyphenols, 1-3 parts of citric acid and 1-3 parts of soluble starch, and further comprises, by volume, 6-9 parts of ethyl alcohol serving as a binding agent, the alkaline granules comprise, by weight, 8-12 parts of tea polyphenols, 1-3 parts of sodium bicarbonate and 1-3 parts of soluble starch, and further comprises, by volume, 5-8 parts of PVP absolute ethyl alcohol solution serving as a binding agent, and the lubricant comprises, by weight, 0.50-0.70 part of PEG6000. The invention further comprises a preparing method of the tea polyphenol effervescent tablets. The prepared tea polyphenol effervescent tablets can be quickly disintegrated in water, effective components are released, which is beneficial to sufficient dissolution and absorption of tea polyphenols, and the healthcare effect is good. The prepared tea polyphenol effervescent tablets are small in size, light in weight and convenient to carry and use, and thus the using performance of the tea polyphenol effervescent tablets is sharply improved.