Stainless steel plate frame multi-layer filter is a precision liquid filter machine, with a mirror polished overall surface, using filter cloth and membrane filtration, adding sealing strips, and stainless steel pump. Specially suitable for solid-liquid separation and liquid filtration in industries such as laboratories, fine chemicals, pharmaceutical chemicals, traditional Chinese medicine extraction, food, cosmetics, etc. The working principle is that the suspension is pumped into each sealed filter chamber of the filter. Under pressure, the filtrate passes through the filter layer, filter membrane or other filter materials, and is discharged through the outlet. The filter residue remains in the plate frame to form a filter cake, thus achieving the purpose of solid-liquid separation.