The work aims to optimize the bag removal device of the high-speed bagging machine by virtue of the invention problem solving theory (TRIZ), so that the removal bag device can move the outer bag to the designated position accurately. Firstly, the TRIZ theory was used to analyze the components of the system of the bag removal device, determine the relationship between them, and establish a component model diagram; according to the causal chain analysis, a comprehensive and in-depth analysis was conducted on the initial problem. The deep-seated shortcomings hidden behind the initial problem were found. Finally, the technical contradiction, technological systematic evolution and object field model in the TRIZ theory were applied to find out the solution ideas. Using the contradiction matrix and standard solution tool of TRIZ theory, five new solutions were obtained for the bag removal device. TRIZ theory provides a new idea for the optimization of the bag removal device, and the obtained scheme is applied to the actual prototype. It solves the problem that the bag moving device cannot move the bag to the designated position accurately.