Saw tooth wave jigger machine is a new type of energy saving and high efficient gravity separation equipment anddeveloped based on the traditional sine wave jig. The difference between saw-tooth wave jig and sinewave jig is that the pulsation curve for jigging is saw-tooth wave shape, with speedy upward flow and slowdownward flow. Allowing significant increase of handling capacity for unit screen surface, decrease of lower limit of grain size recovery and large save of make-up water for under-size fraction.