The work aims to improve the design of baffle gauge of buckle folding machine to reduce the noise and the occupational hazards during work, and design a new noise reduction method. Firstly, the source of the working noise of the folding machine was analyzed. Secondly, the noisiest part was selected to analyze the problem and establish the problem model, and analyze the problem model to dig out the innovative solution according to ARIZ problem solving process. Finally, the innovative solution was evaluated from the aspects of cost, operability and availability. According to the ARIZ problem solving process, three kinds of excellent improvement schemes and an optimal solution for the noise reduction of the baffle gauge were obtained. The combination of square block and circular brush wheel is a better scheme to improve the noise reduction of the baffle gauge. It also proves that ARIZ innovative method can be effectively applied in noise reduction design, which provides a theoretical basis for the noise reduction design of folding machine.