Abstract: To investigate the influence of liquid viscous damper parameters on the seismic control of high-pier rigid frame bridges under different intensity earthquakes, a 65 m high-pier rigid frame bridge was chosen as the engineering case study. The finite element model was established using midas Civil 2020, and nonlinear time history analysis was performed. The research findings indicate that overall, the beam-end displacement and pier base internal forces increase with an increase in the damping coefficient C, while they decrease with an increase in the damping exponent α. Considering factors such as beam-end displacement, pier base internal forces, and the manufacturing difficulty of liquid viscous dampers, it is recommended that for general seismic actions, the damping parameters of the bridge’s liquid viscous damper be set at C=6000 kN（m/s）^-α and α=0.4. For strong earthquakes, C=7000 kN（m/s）^-α and α=0.4 are suggested. It is observed that the same parameter damper exhibits different seismic reduction effects under different intensity earthquakes. Under strong earthquake excitation, the maximum reduction rates for the along-bridge beam-end displacement, 3rd pier base bending moment, and 3rd pier base shear are 48%, 23% and 35% respectively. Under general and strong earthquake excitations, the average reduction rates for the bending moment, shear force, and displacement at the top of each pier are 11.0%,15.9%,32.3% and 46.1%,44.0%,45.1% respectively. Overall, these findings indicate that liquid viscous dampers are suitable for seismic design in high-pier rigid frame bridges under earthquake excitation.