Due to the excellent biodegradability, biocompatibility and mechanical properties of magnesium alloy, the possibility of magnesium alloy as intravascular stent was studied. Firstly, based on our previous work, a compact fluoride conversion coating was prepared on the surface of AZ31B magnesium alloy. The hemolytic tests, blood coagulation tests and platelet adhesion tests were carried out to evaluate the hemocompatibility of the fluoride treated AZ31B magnesium alloy. The surface energy was measured to analyze the mechanism of the hemocompatibility of the samples. Results show that the fluoride treated AZ31B magnesium alloy has potential application value in intravascular stenting.