AIM: To study the hemostasic mechanism of Agacutase on blood system. METHODS: Heparin,hirudin,PMSF,calcium,or urea was mixed with Agacutase respectively and the enzyme activity were observed. The blood coagulation and fibrinolysic parameters in New Zealand white rabbits were observed after iv Agacutase. RESULTS: Hirudin or heparin had no effect on the enzyme activity. PMSF or urea inhibited the enzyme activity obviously whereas calcium activated the activity. 0. 03-0. 12 U / kg dose of Agacutase induced the...