Abstract: Shield machine is widely used in tunneling as advanced large construction equipment. Shield machine has two obvious differences from common construction equipment, one is shield structural components are made up of steel plates with hyper-thickness, which brings huge workload, the other is the designed shield according to tunnel geological conditions has special shape, size, weight and even structure type, which brings challenges for robotic welding. In order to carry out robotic welding in shield structural components successfully, several key technologies must be solved, such as residual stress and distortion , weld seam sensing and tracking, off-line programming and teaching, and multi-robots collaboration. In the future development of shield structural components robotic welding, CAPP functions can be improved by automatic joint figure generating, intelligent groove planning, to strengthen welding process monitoring by merging multi-technologies such as virtual reality (VR)，and Welding Procedure Specification ( WPS) is developed, which will become important fields. Shield machine is widely used in tunneling as advanced large construction equipment. Shield machine has two obvious differences from common construction equipment, one is shield structural components are made up of steel plates with hyper-thickness, which brings huge workload, the other is the designed shield according to tunnel geological conditions has special shape, size, weight and even structure type, which brings challenges for robotic welding. In order to carry out robotic welding in shield structural components successfully, several key technologies must be solved, such as residual stress and distortion , weld seam sensing and tracking, off-line programming and teaching, and multi-robots collaboration. In the future development of shield structural components robotic welding, CAPP functions can be improved by automatic joint figure generating, intelligent groove planning, to strengthen welding process monitoring by merging multi-technologies such as virtual reality (VR)，and Welding Procedure Specification ( WPS) is developed, which will become important fields.