Abstract: Given the inherent limitation of the currently used coal washing processes, the middling and refuse are dumped in a mixed manner, causing therefore loss and waste of coal resources and an adverse effect on environment of surrounding area. In order to abide by the business principle of allowing no loss of coal and no environment pollution and practising strict economy, increase recovery of coal product and improve economic performance, the middling and refuse products are rewashed using jigging machine. An analysis of the result obtained in field application of this process is made in the paper. Practice shows that the application of the rewashing process makes it possible to increase recovery of clean coal product, make full use of coal resources, maximize economic benefit and elimination of risk of environmental pollution.