Aluminum Oxidant based ceramic membrane is porous precise ceramic filter material which be made by special technology from the materials of aluminum oxidant, titanium oxidant and zirconium oxidant etc. Its filter precision covers microfiltration (0.05μm-1.5μm), ultra filtration (0.01μm-0.05μm), even nano filtration (<1nm). Ceramic membrane filtration is a fluid separation process of cross flow filtration. Driven by pressure, raw material liquid runs fast in the membrane tube, clear liquid contains molecular fraction outward through the membrane, concentrate liquor contains macromolecular components be retained by membrane, thus the fluid achieves separation, concentration and purification.