Diatomaceous earth filter refers to the coating filter with diatomaceous earth coating as the filtration layer, mainly using the mechanical sieving action to deal with the water filtration treatment process containing tiny suspended matters. Diatomaceous earth filters filtered wines and beverages have unchanged flavour, are non-toxic, free of suspended solids and sediments, and are clear and transparent. The diatomite filter has high filtration accuracy, which can reach 1-2 microns, can filter out Escherichia coli and algae, and the turbidity of the filtered water is 0.5 to 1 degree. The equipment covers a small area, low height of the equipment, the volume is only equivalent to 1/3 of the sand filter, can save most of the investment in civil construction of the machine room; long service life and high corrosion resistance of filter elements.