The invention discloses a mango water retention sterilization filming liquid which consists of shellac, glycerol monostearate, sodium carbonate, enestroburin, amino oxyl acetic acid and a solvent, wherein the mass concentration of shellac is 15-20%, the mass concentration of glycerol monostearate is 0.1-0.2%, the mass concentration of sodium carbonate is 0.3-0.5%, the mass concentration of enestroburin is 0.003-0.006% and the mass concentration of amino oxyl acetic acid is 0.001-0.002%. Through the adoption of the mango water retention sterilization filming liquid, the freshness cost is lowered, no cold tolerance pathogenic bacterium is generated, inspiration of mango and growth of bacteria on the surface of mango are inhibited, and rot is prevented. The water retention sterilization filming liquid is good in stability, the mango is not deteriorated after being preserved for half a year, the surface of the mango can be smooth and fresh by using the water retention sterilization filming liquid, the fruit rot rate is less than 3% after 100 days, the driage is less than 12%, and the taste is kept fresh.