With the development of the domestic economy, the construction industry technology has also made a great progress. People are demanding structure systems with more changes. The slab conversion layer structure can fulfill the demand of large space at the bottom. But the transfer floor structure is heavier with complex stress and difficult construction. Thus there is little application of this system. To realize this structure system, this paper mainly aims at the analysis of the influence of supporting system under construction, and combines the engineering example of slab conversion layer structure, using ABAQUS to establish the simulation model to analyze the supporting system force under the action of large volume concrete pouring path.