In order to meet the non-stationary spatial deformation characteristics of coherence function and standard response spectrum, long-span space truss structures only take the forward bearing capacity as the index, ignoring the node state where the maximum bearing capacity is located, which makes it difficult to confirm the specific deformation position. Therefore, this paper proposes a deformation identificationDeformation identification technology of long-span space truss structures based on BIMBuilding Information Modeling (BIM)+GIS integrated model. The deformation identificationDeformation identification process is divided into three aspects: pre-identification analysis, mid-identification analysis and post-identification analysis. The deformation identificationDeformation identification analysis process of long-span grid structureGrid structures is designedDesign structure, and the BIMBuilding Information Modeling (BIM)+GIS integrated model is constructed by using BIMBuilding Information Modeling (BIM)+GIS technology. According to the calculation results of the bending moment design value of the long-span space truss structure, the positive bearing capacity of the structure in the normal use state is calculated, the nodes of the long-span space truss structure are adjusted, the overall layout is deepened by using the BIMBuilding Information Modeling (BIM)+GIS integrated model, and the node state where the maximum bearing capacity is located is confirmed, so as to identify the deformation position of the long-span space truss structure. The experimental results show that all grid structuresGrid structures can bear a certain load, and the displacement of each area is within 80 mm, which is in line with the expectation. The closer the value of P in this paper is to 1, the rationality of the process of deformation identificationDeformation identification and location confirmation can be improved.