Objective:To achieve an effective method of purifying earthworm fibrinolytic enzymes (EFE), and study the characteristics of EFE as well.Methods:The procedures of purification included buffer extraction, selective thermal denaturation and chromatographies on EFE inhibitor 1.6 hexamethylediamine (HD) Sepharose 4B and DEAE Sepharose. Results and conclusion:Strong fibrinolytic components (EFE F 1、 2, EFE F 3) were purified. For EFE F 3, Km of S 2288 is 0.01mmol...