Abstract: In order to solve the problems of low treatment capacity,high accident rate and high moisture content in product in original filter press in Linhuan coal preparation plant,utilized the KZGS650/2000-U quick-openting diaphragm filter press to dewatering.On the basis of introduces the structure,working principle and technical features of the filter,the paper analyzed the application of the machine in Linhuan coal preparation plant,the results show that the filtration efficiency is increased in plant.