Abstract: A new type of warning appliance for safety measures is designed to overcome the shortcomings of the existing technology and provide a warning appliance for safety measures aimed at improving job security and work efficiency. It has the remarkable feature of "one for many purposes" and can be widely used in the protection pressing plate, air switch, operating handle, etc. on each cabinet. The structural characteristics and on-site usage methods of the appliance were introduced, and a large number of pictures were displayed, indicating that the method is feasible.