The rabbit body was irradiated acutely by 2.45 GHz continuous microwave. After irradiation, the values of blood viscosity, blood viscoelasticity, platelet aggregation, erythrocyte fragility, erythrocyte deformation, erythrocyte aggregation, the compressive mechanic property and flexible property of bones were tested. The data of irradiated group and unirradiated group were compared. The results showed: after microwave irradiation, the rabbit blood viscosity and viscoelasticity decreased; the rabbit platelet aggregation rate decreased and the disaggregation rate increased; the erythrocyte fragility increased; the biomechanic properties of bones did not change considerably.