In order to solve the high vibration and energy dissipation of rotary grading screen, the system energy of the rotary grading screen in operation process was analyzed. The total energy of system in operation process was periodic, and it caused the high vibration and energy dissipation of the rotary grading screen. A method based on the constant total energy of system was proposed and the elastic component was disposed. It transformed dissipated energy into elastic potential energy and transformed elastic potential energy into driving energy so as to remain the constant total energy of system. The experimental results showed that the proposed method saved energy consumption by 21.71% and decreased vibration by 30.89%. It had better effect in energy saving and vibration decreasing.