The static and dynamic characteristics of hydraulic bushings with different numbers of inertia tracks and orifices were tested, and the working mechanisms of different hydraulic bushings were described. Furthermore, lumped parameter models of hydraulic bushings with multiple inertia tracks and orifices were proposed for estimating the dynamic stiffness and the loss angle. The relationships among the calculated dynamic stiffness and the loss angle with the number of the inertia tracks and the shape of the crossげ-section were analyzed and compared with the test data. A good correlation validates the proposed models, which can be used to analyze performances of hydraulic bushing with different structures before prototypes