Abstract: The actions and influenees of non-sinusoidal diagrams on separation of fine grain material were researched emphatically with the autogenous heavy-media jigging equipment. The material was artifical mixed mineral made up of magnetite and quartz of -0.1 mm. The result demonstrated that a non-sinusoidal diagram could get better effect of benefication than the sinusoidal diagram. It was more helpful to form the autogenous dense medium bed.