NOVELTY - Extraction of high-purity bilirubin involves preparing low-purity bilirubin solvent by mixing dichloromethane with dimethyl sulfoxide; preparing low-purity bilirubin solution; optimizing concentration of dimethyl sulfoxide in the low-purity bilirubin solution to separate the bilirubin solid; extracting and filtering to prepare bilirubin filter cake; eluting the obtained bilirubin filter cake via methanol and purified water, and extracting and filtering to obtain bilirubin filter cake, which is then dried to obtain the high-purity bilirubin.    USE - Method for extracting high-purity bilirubin (claimed).    ADVANTAGE - The method is capable of producing bilirubin product having a purity of more than 97%. The bilirubin product is low in production cost, low in pollution, and high in yield.    DETAILED DESCRIPTION - Extraction of high-purity bilirubin involves:    (A) preparing low-purity bilirubin solvent by mixing dichloromethane with dimethyl sulfoxide at ratio of 1 L/4.5-5.5 L;    (B) preparing low-purity bilirubin solution by placing the low-purity bilirubin into the prepared bilirubin crude product solvent at a ratio of 1 g/11-13 L, and completely dissolving to prepare the low-purity bilirubin solution;    (C) optimizing concentration of dimethyl sulfoxide in the low-purity bilirubin solution to separate the bilirubin solid at dimethyl sulfoxide to purified water ratio of 1 L/4-4.7 L, adding purified water into the low-purity bilirubin solution, stirring and adding until the bilirubin solid is completely separated;    (D) extracting and filtering to prepare bilirubin filter cake by extracting and filtering the mixed solution with the separated bilirubin solid to obtain a bilirubin filter cake 1;    (E) eluting the bilirubin filter cake 1 via methanol and purified water, eluting until the filtrate is colorless, rinsing via anhydrous ethanol, finally adding into dichloromethane for rinsing until no eluent flows out via extracting and filtering to obtain bilirubin filter cake 2;and    (F) drying the bilirubin filter cake 2.