The invention relates to a riluzole orally disintegrating tablet and a preparation method thereof, belonging to the field of preparations. The tablet is prepared from riluzole, sodium bicarbonate, filler, disintegrant, lubricant and flavoring agent. The preparation method is as follows: 1) Weigh the prescribed amount of riluzole, sodium bicarbonate, filler and 50% of the prescribed amount of disintegrant, mix evenly, and prepare the mixture for later use; 2) add the mixture in step 1 to granulate with ethanol aqueous solution, and dry After sieving, the dry granules are ready for use; 3) Add 50% of the disintegrating agent of the prescribed amount and the flavoring agent of the prescribed amount to the dry granules of step 2, mix evenly, then add the lubricant of the prescribed amount, mix evenly, and compress to obtain Riluzole orally disintegrating tablet. The orally disintegrating tablet prepared by the invention has short disintegration time limit, high dissolution rate and no gritty feeling, meets the quality standard requirements of the orally disintegrating tablet, and is suitable for industrial scale-up production.