Shaking system is auxiliary device for once open filter press. It is consists of driven motor and shaking rod. When all plates are opened, all plates will keep a same pitch, then the motor will driven the shaking rod. On the rod have lots of deflection vane, which is match the position of plate handles. Every cycle, the deflection vane will rise up the handles one time, then handles will falls to the beams under gravity, thus a shaking force can remove the residual cakes on the filter cloth.