Abstract: The sieve bend originally used for dewatering and desliming of overflow of tectered-bed separator was poor in efficiency, and the flotation concentrate was found to contain a noticeable amount of fine slime. To address this issue, renovation work is made by the washery through shifting to the use of electromagnetic screen for desliming of overflow of teered-bed separator, the use of spiral separator for scavenging of the separator′s tailings product, and the addition of a flotation system consisting of a roughing stage and a cleaning stage. It is predicated that the renovation my lead to noticeable improvement of coarse slime cleaning result and flotation indices, a rise of yield of total clean coal product by 1.98 percentage points and a favorable economic result.