The invention discloses a method for efficiently producing 
carotenoid. The method comprises the steps that juice with the high 
carotenoid content is obtained by taking canned yellow peach leftovers as main raw materials through 
microwave color fixing, frozen-breaking and biological enzymolysis, and after the ingredients are regulated, a 
fermentation medium is obtained; fractional 
inoculation and temperature-variable 
fermentation are conducted on oceanic red 
yeast inoculated with the high-yield 
carotenoid, so that the oceanic red 
yeast is maximumly proliferated; after 
fermentation liquid is subjected to ultrahigh pressure homogenizing, vacuum centrifuging and demulsifcation separating, 
emulsion is obtained, and after the 
emulsion is extracted, separated and purified, the finished carotenoid is obtained, wherein the 
cell biomass of the fermentation liquid is 38-52 g / L, and the yield of the carotenoid is 47-61 mg / L. The preparation method is simple, the cycle is short, the efficiency is high, energy is saved, environmental friendliness is achieved, a low-temperature bio-
processing technique is adopted in the whole process, the production cost is reduced, hidden environmental 
pollution danger is eliminated, a firm foundation is laid for 
sustainable development of the field of yellow peach 
deep processing technologies, and the positive economic and social development significance is achieved.