Objective To explore a method to separate and purify apolipoprotein Ⅰ from human serum conveniently and efficiently. Methods Apolipoprotein Ⅰ was separated and pufified by ultracentrifugation and affinity chromatography. Then the purified apolipoprotein Ⅰ was analyzed by SDS-polyacrylamide gel electrophoresis and agar gel double immunodiffusion test. Results The purified apolipoprotein Ⅰ was satisfactory. Conclusion This method had good reliability and was convenient and economical.