Abstract: To overcome the multivariable strong-coupling and difficulties in modeling during pulsed MIG welding of aluminum alloy,this paper transferred the multivariable controller design in original space to multi-loop SISO controller design in latent space and designed PID controller for each control loop independently, based on the decoupling and modeling advantages of the dynamic PLS framework. The characteristics and structure of the controller design in this framework were introduced,and the simulation of aluminum alloy pulsed MIG welding was carried out. The results demonstrate that the controller design using the dynamic PLS framework can obtain satisfactory dynamic and steady characteristics, and can be applied to other welding processes. It provides basis for the application of dynamic modeling and control methods,based on data-driven,in complex welding processes.