The invention relates to a delayed removing type display board used in an electric power engineering field and an application method, and belongs to the technical field of electric power engineering equipment. The delayed removing type display board comprises an upper frame and a lower frame. A rotating shaft is arranged between the upper frame and the lower frame. Rotating blades are arranged outside the rotating shaft. An eraser is arranged at the bottom of the upper frame and connected with rotating wheels through a rotating belt. The rotating wheels are arranged in the upper frame and the lower frame correspondingly. When the flat board needs to be used for conducting writing or displaying on the site, the surfaces of the rotating blades are used for presentation, after one faces are written completely, the rotating shaft is rotated, the faces with the content are rotated to the back side, the clean faces are rotated to the front side, the rotating wheels drive the eraser to erase the content on the back rotating blades through the rotating belt, convenience and rapidness are achieved, and the writing or displaying continuity is not delayed.