In order to discover the mechanism of Xuebijing oral effervescent tablet (XBJOET) to treat infectious diseases, the effect of XBJOET on endotoxin induced rabbit fever and disseminated intravascular coagulation (DIC) was investigated.  Auricle microcirculation in rabbit was detected by laser speckle blood perfusion imager system; coagulation function was measured by coagulation analyzer, fibrinolytic system was quantified by Elisa assay and micro thrombosis in tissues was observed with HE staining under light microscope.  The results demonstrated that the body temperature of rabbit decreased significantly at 1−3 h after administration with 4.8, 2.4 and 1.2 g·kg⁻¹ XBJOET to endotoxin induced DIC rabbit model, the auricle microcirculation blood flow in model group (54.45 ± 14.53) PU was lower than that in control group (77.18 ± 12.32) PU.  The auricle microcirculation blood flow increased markedly and there was significant difference between model group and 1.2 g·kg⁻¹ XBJOET group.  There was significant difference between model group and control group in the content of PAI1 and FIB.  The PAI1 levels in model and control groups were (30.48 ± 2.46) ng·mL⁻¹ and (20.93 ± 3.25) ng·mL⁻¹, respectively.  The FIB levels in model and control group were (3.34 ± 1.09) g·L⁻¹ and (4.84 ± 1.10) g·L⁻¹, respectively.  The content of PAI1 in rabbit plasma decreased notably, there were significant differences between model group and 4.8, 2.4 g·kg⁻¹ XBJOET groups.  On the contrary the content of FIB increased.  XBJOET possessed pharmacological activities of curing infectious fever and DIC, the mechanism of which is related to amelioration of microcirculation disturbance, inhibition of fibrinolytic system activation and coagulation and micro thrombosis elimination.