Abstract: Realization of high-output high-efficiency operation at Tangshan Mine Coal Preparation Plant is restricted by the high content of large pieces of coal and gangue materials in raw coal. To reverse this situation and in consideration of the structure of the existing workshop,a movable-bed jig is used in place of the existing selective crusher,and an analysis is made of the feasibility of deshaling with movable-bed jig based on the data relating to quality,property and size and density consist of raw coal. Practice shows that the use of the jig in the raw coal pre-treatment system has led to improved washability of raw coal feed and reduction of the total volume of raw coal for treatment,and the increase of the raw coal output of the coal mine.