In recent years,the MLCC (Multi-layer Ceramic Capacitors ) market shows a fast growth. MLCC is widely used in mobile phone, 5G, video and audio equipment, PC, automobile, Internet of Things and other fields. Ceramic membrane filtration technology have been successfully applied for production of MLCC raw material like BaTiO3, TiO2. Crossflow ceramic membranes are used for purification washing for such nanometer particles to remove impurities and acid.