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This invention belongs to the field of cosmetic raw material preparation technology, specifically relating to a method for decolorizing Xinjiang erythromycin, its products, and applications. The method includes: raw material pretreatment: pulverizing Xinjiang erythromycin and processing it using high-pressure instantaneous explosion technology; extraction: extracting the pretreated material with an ethanol-water solution, and obtaining a crude extract of Xinjiang erythromycin after solid-liquid separation; activated carbon decolorization: adding ethanol to the crude extract and mixing evenly, then adding activated carbon for decolorization treatment, followed by solid-liquid separation after decolorization; resin purification: loading the supernatant obtained after decolorization onto a resin column, performing gradient elution, collecting the ethanol eluent rich in phenolic acids, concentrating, and drying. This invention achieves an excellent balance between efficient decolorization and retention of highly active ingredients. It can strongly adsorb and remove dark pigments while significantly reducing the adsorption loss of the target phenolic acids.