Abstract: To address the current issues of inadequate surface conformity between the filter disk and filter sleeve in pressure filters, the necessity of entire replacement due to single-sided damage, and long replacement time, a study is made of the structure of both filter cloth and disk as well as the technical scheme for cloth fixation, and an improved solution is proposed that single-piece trapezoidal filter cloth with location holes is fastened with screws onto trapezoidal filter disks with peripheral fixed grooves under the action of sealing strips and fixed pressure plate. The results show that the optimized filter cloth not only can effectively avoid the damage caused by frequent friction to prolong service life, but also can be replaced by a single piece to save usage, while its convenient disassembly and assembly method also enhances maintenance efficiency. According to calculations, the service life of filter cloth is expected to be extended by 5%～8%, the usage can be reduced by 10%～15%, and the replacement time can be shortened by 30%～40%. This improvement can effectively enhance operational efficiency, reduce quick-wear parts consumption, decrease waste of resources, and provide more efficient, economical and environmentally friendly solutions for coal washing processes, playing a significant role in promoting sustainable development of the coal industry.