To observe the effect of salvianolate on the noninvasive hemodynamic parameters after total hip arthroplasty. Methods:Sixty inpatient patients who had total hip arthroplasty in March 1, 2016 to February 1st 2017 in the department of orthopedics of the hospital were selected and were randomly divided into observation group and control group, with 30 cases in each group. Patients in the control group received conventional total hip replacement operation, while patients in the observation group additionally received salvianolate injection. Arterial floating catheter was placed by internal jugular vein puncture, and multi-functional monitor and noninvasive hemodynamic monitor were connected to record and monitor blood gas parameters, blood pressure and hemodynamics of patients before and after the treatment. Blood rheology parameters were monitored at the same time. Results:1) The parameters of blood gas and blood pressure were comparable in the two groups (P>0.05). 2) After the operation of two groups, high blood viscosity, low blood viscosity, hematocrit and plasma viscosity all decreased (P<0.05), but those of the observation group was significantly lower (P<0.05). 3) The maximal peak velocity, the end diastolic velocity, pulsatility index and vascular resistance index of the two groups increased (P<0.05) and those of the observation group were higher than those of the control group (P<0.05). Conclusion:Salvianolate can reduce the blood viscosity of patients who had total hip arthroplasty, improve the hemodynamic parameters and enhance the recovery of patients.