With the increasing calls for standardization, industrialization and rapid construction, the requirements of traffic organization during the construction are continuously improved so as to promote the further study on how to increase the rate of prefabricating assembly. The development process of prefabricating assembly technology is reviews. Combined with the practical projects, the prefabricating assembly technologies of the conventional stand column and bent cap of urban bridge are summarized. The design and construction schemes of prefabricating assembly for the large-volume bent cap and base slab are put forward.