Welding robot can greatly improve the working conditions of workers and increase productivity, and the key to ensure the quality of weld forming is to choose reasonable characteristic parameters for the welding robot.The influence of key characteristic parameters on welding quality in the welding process of welding robot was analyzed. The different parameters prediction methods and the parameters characteristics were analyzed and reviewed. The development trend of the characteristic parameters prediction methods for welding robot was prospected, and the future research direction was put forward.