The installation of the support is an important link in bridge construction. How to ensure that no deviation occurs during the design of the closing temperature after the installation of the support? Taking the installation of the steel box beam support in the Hong Kong-Zhuhai-Macao project as an example, a new vibration isolation rubber support pre-deflection device has been applied in the project. The advantages of the device are small structure, light weight, high precision and strong applicability, no need for external structure as a reaction support, the support itself is a reaction, with easy operation, no damage to the bridge and the support and other advantages.