To improve the stress in the negative bending moment zone of the support point in the steel-concrete composite structural continuous girder, taking a bridge project in the starting area of Taiyuan in Xiaohe Industrial Park in Shanxi Transformation Comprehensive Reform Demonstration Zone as an example, by using the support displacement method to apply priestess, the influence rule of different support point displacements on the stress change of the steel-concrete composite structural continuous girder is studied. For the U01 joint, the problem of insufficient reserve of reaction force at the support points of the side pier is solved by using the support displacement method. Compared with the conventional methods such as support point weighting, the engineering costs are saved, which can provide reference for similar projects in the future.