The invention discloses a method for producing a dragon fruit health drink. The method comprises the steps of selecting and utilizing fully-grown fresh red core dragon fruit without mildew and rot or mechanical damage as a raw material; peeling the selected fresh dragon fruit and cutting the fresh dragon fruit into flakes with the thickness of 60 mm to 80 mm; mixing the flake dragon fruit, rock candy and brown sugar to ferment and stacking the fresh fruit and sugar in a fermentation barrel alternately, wherein the ratio of dragon fruit pulp to the rock candy to the brown sugar is 4 to 0.7 to 0.3, the fermentation temperature is 22 DEG C to 28 DEG C, and the fermentation time is 12 to 20 days; filtering the dragon fruit pulp, the rock candy and the brown sugar by a 100-mesh filter screen, performing standing and clarification for 10 to 15 days, performing bottling, and performing sealing and storage after low temperature sterilization. According to the method, a natural bacterial strain is utilized to perform fermentation, no chemical preservative is added, and the nutritional ingredient and the activity of enzyme of the dragon fruit are kept effectively. The fermentation time according to the method is short (12 to 20 days), the probability of bacterial contamination is reduced, the quality can be controlled easily, and the product quality is stable.