Based on the Gongzhufen Station of Beijing Subway Line 10 closely-attached intersecting the existing Gongzhufen Station of Line 1, which has applied the technology of “center cross diagram(CRD) method + multiple top bracing”, the finite difference procedure FLAC3D was used to establish a 3D numerical calculation model. The change of soil plastic zones and deformation law of existing subway station in the construction process of the new station were studied. The results have shown that carrying on the closely-attached intersecting construction using “center cross diagram (CRD) method + multiple top bracing techniques” can effectively control the structure deformation and meet the requirements of settlement limiting value. By comparing the simulated deformation curves and the measurements, a good agreement was obtained. Once the construction is completed, the profile of the existing structure presents double-groove shape deformation while the lateral shows “V” glyph settling tank, which is similar to Peck curve, and the sedimentation value of the bottom plate is slightly larger than that of the top plate. Jacks unloading may cause large deformation or even cracking on the structures' local parts, so the axial force should be graded to release. During the process of excavation, the soil mainly experiences a shear failure and the plastic zones tend to extend outward into a butterfly shape in the four corner area. In order to realize the active control of the settlement deformation of existing structures, the construction idea of “synchro jacking-up, servo control” was put forward.