Abstract ： Research purposes ： The ship - bridge collision happens sometimes，which usually causes the damage of the bridge structure，service life and the security，even some catastrophic consequences like bridge collapse and death. According to accident investigation and analyses，it has been one of the tough questions in bridge engineering that ship - bridge collision may probably destroy the bridge. The data from America and all over the world shows 10; bridges were destroyed by ship collision. And it is predicted that the percentage will become bigger in the future. Thus，preventing bridge from ship collision becomes an international issue，and gets more and more attention from governments，scholars and engineering. Bridge structures must be capable of resisting ship and barge collision loads， and bridge design specifications employ equivalent static design loads due to vessel impact as an alternative to conducting fully dynamic impact analyses. To study dynamic responses of whole bridge installed lead rubber bearing( LRB) to barge impact，the ANSYS finite element code is presented in this paper. In the finite element model，barge - bridge collision process is simulated by impact element，and components of bridge，such as beam，pier and pile，are modeled by spatial beam elements. Therefore， a scientific basis is provided to improve the ability of anti - collision and safety in bridge engineering design. Research conclusions ：( 1) In this paper，linear viscous damping is considered the energy loss while impacting between barge and bridge. Results indicate that impact loads calculated by this paper method are about 80; of values which are based on full perfect elasticity collision model. (2) Lead rubber bearing can prevent impact energy transmitting from impacted pier to superstructure of bridge, which reduce the superstructure responses. In this paper, the isolation - rate of example is more than 70;. (3 ) It provides a basis for the ship speed and operation, the design and constructing of ship beam and pier, even for solving some maritime disputes.