Sodium-potassium citrate chewing tablet and preparation method thereof

The invention provide a sodium-potassium citrate chewing tablet, of which the prescription is composed of the following components by mass percent: 33.0-33.1% of potassium citrate, 27.8-27.9% of sodium citrate, 28-32% of filling agent, 0.05-0.3% of adhesive, 1-1.5% of lubricant, 3-5% of flavoring agent, 0.1-0.3% of aromatizer and 3-4% of moistureproof film coating agent, wherein the filling agentis mannitol or a mixture of mannitol and sorbitol or xylitol; the adhesive is hydroxypropyl methylcellulose or polyvidone K30; the lubricant is magnesium stearate or a mixture of magnesium stearate and micropowder silica gel; the flavoring agent is citric acid or a mixture of citric acid and sodium saccharin, aspartame or steviosin; and the aromatizer is pharmaceutically acceptable essence. The invention also provides a preparation method of the sodium-potassium citrate chewing tablet. The preparation method is simple and convenient to operate, low in cost and suitable for industrial production. The obtained tablet ha