Special anti-browning preservative convenient for high temperature sterilization of dried beancurd sticks, and preparation method and application of preservative

The invention discloses a high-temperature anti-browning preservative for dried beancurd sticks. The anti-browning preservative comprises the following components in parts by weight: 1-3 parts of high-temperature anti-browning agent, 0.5-1.5 parts of film-forming agent, 0.5-2.5 parts of preservative, 5-25 parts of oil dispersant, 0.5-1 part of antioxidant and 92.5-67 parts of water. The invention also provides a preparation method and an application of the high-temperature anti-browning preservative for dried beancurd sticks. The method comprises the steps: regulating the pH value, dissolving the film-forming agent in an ethanol-water solution, adding the high-temperature anti-browning agent and stirring at a constant temperature, and then adding the oil dispersant and the antioxidant, and stirring evenly, homogenizing for 20 minutes under the condition from 1.6*10<4> to 2.0*10<4>r / min, and carrying out spray-drying at air inlet temperature ranging from 185 DEG C to 215 DEG C and an air outlet temperature ranging from 60 DEG C to 80 DEG C, thus obtaining powder. The high-temperature anti-browning preservative for the dried beancurd sticks is low in usage amount, good in preservation effect, non-toxic and pollution-free.