In this paper, through the transformation of Xiguan bridge around the island in Beijing Changping, the main implementation process of the first overall replacement project of bridge superstructure, the paper introduces in detail the computer automatic control integrated hydraulic technology with different functions for self-propelled beam carrier, load sharing system, synchronous jacking jack system, beam lifting machine and universal jack. Based on the accurate analysis and verification of the stress conditions in the construction process of the space special-shaped structure by the computer finite element software, combined with the application of the computer automatic control hydraulic jacking technology in the key processes of supporting, moving and transporting the old beam, lifting and crushing the old beam, weighing the new beam as a whole, transporting the new beam as a whole, and accurately placing the new beam as a whole during the use of the old beam, the roof support system can be used in the special-shaped plate It is an important prerequisite for the smooth implementation of the new construction method to automatically adjust and adapt to the large difference of the reaction force of each fulm, and to keep the deformation of the beam body under the change of the vertical and horizontal slope of the route during the moving process.