Rapidly disintegrated vitamin C effervescent tablet and preparation method thereof

The invention provides a rapidly disintegrated vitamin C effervescent tablet with the advantages of rapid disintegration, small weight difference and better stability and a preparation method of the rapidly disintegrated vitamin C effervescent tablet, wherein the rapidly disintegrated vitamin C effervescent tablet comprises vitamin C used as an active ingredient, and an effervescing agent, a diluting agent and a lubricating agent as auxiliary materials, the lubricating agent is selected from super-fine ground water-soluble starch, the content ratio of the vitamin C as the active ingredient to the lubricating agent in the tablet in the terms of weight percent is 10:1, preferably, 5:1; and the content of the lubricating agent in the tablet is 0.5-8 percent by weight, preferably 2-5 percent by weight.