The present invention relates to a Chinese herb for curing recurring mouth ulcers, and belongs to the medicine curing ulcers, which comprises 15g raw radix astragali, 30g heterophylly faalsestarwort root, 10g angelica, 30g raw radix rehmanniae preparata, 10g radix ophiopogonis, 15g liquorice, 3g asarum, 10g desertlivingcistanche, 30g red peony root, 6g raw cattail pollen wrapped by cloth, 15g honeysuchle flowers, 15g forsythia suspense, 6g cortex phellodendri, 10g bracken, 6g largetrifoliolious bugbane rhizome, 6g radix BUPLEURI, 3g akebiaquinata, 6g mint and 3g cinnamon, additionally, 9g desertlivingcistanche is milled into powder, and 10g gallnut is dipped by boiled water to make juice, the cinnamon in the recipe is milled into powder; one dosage is for every day, the medicine liquid is taken completely for three times, after the liquid medicine is taken, the cinnamon is taken by flushing way, after the period of treatment is over, the desertlivingcistanche powder is taken, and the gallnut juice can be used for gargling, thereby one complete period of treatment is finished; the present invention is characterized in that the recipe is simple, the taking and using are easy, the fabrication method is simple, the curing effect is ideal and the medicine price is low, specially the invention is suitable to be used for people living far away from downtown center and living in village, the curing fee for people suffering from mouth ulcers is low, the invention solves the problem of poor curing condition due to low family earning, poor living standard and shortage of local medical condition.