In order to study the failure characteristics and mechanical behavior of antique buildings dual-lintel-column subassemblag? es， typical archaize building dual-lintel-column subassemblages were selected as the model structure， and the specimens adopted the steel-concrete composite structure and viscous dampers are set at the connection. Total 3 specimens were designed and tested under fast harmonic load， including two specimens with viscous damper and one specimens without viscous damper. On the basis of experimental study， the key indexes of mechanical properties are analyzed， such as the load-displacement hysteretic curve of specimens and viscous damper， the skeleton curve， load-bearing capacity and deformation performance， stiffness and strength deg? radation. The results indicate that the mechanical properties of antique buildings dual-lintel-column subassemblages with steel and composite structures and viscous damper can significantly increase the mechanical properties， and the hysteretic curve of the damp? ing joint is plump. The descending phase of skeleton curves is smoother， and the deformation capacity has been significantly improved. The carrying capacity is increased by 13.9%~14.1%， and Displacement ductility is increased by 13.0%~18.6%. The vis? cous damper and the dual-lintel-column subassemblages can work together， which can significantly improve the deformation performance of the structure at the failure stage and enhance the collapse resistance of the structure.