The invention provides a welding production line of soft packaging battery switchover pieces and a production technology. The welding production line comprises a pre-welding mechanism for pre-weldinga lead of a soft packaging battery, a lead cutting mechanism which is used for cutting the lead of the soft packaging battery, a switchover piece feeding mechanism which is used for placing positive and negative electrode switchover pieces on the soft packaging battery, a switchover piece welding mechanism which is used for welding the positive and negative electrode switchover pieces to the leadof the soft packaging battery, a conveying mechanism for transporting the soft packaging battery on the welding production line and a control system for controlling operation of the mechanisms. The welding production line of the soft packaging battery switchover pieces and the production technology aim at solving the problem of low yield of home equipment at present, switchover piece positioning adopts CCD positioning and a robot feeding mode to eliminate the errors caused by the processing and assembly accuracy of fixtures and the deformation of batteries, the control over the accuracy of dimension tolerances such as the center distance after welding of the switchover pieces is improved, and good support is provided for subsequent packaging.