Abstract: In order to cater to the need for upgrading of coal cleaning system and expansion of capacity of Wangjiata Coal Preparation Plant, following a technical feasibility study, the TDS intelligent dry cleaning machine is introduced. Unlike the traditional wet cleaning process, the upgraded system operates with a combined processes consisting of TDS, fines removal screen and shallow-bath heavy medium separator, which can effectively treat the 150~6 mm power coal. The use of the system has led to less generation of coal slime and enhanced coarse coal yield and quality, creating, as a result, an economic gain of 23.6598 million yuan for the plant per year. It proves to be a new approach for the upgrading and expansion of capacity of power coal cleaning plants.