The paper mainly investigated the effect of ultrasonic field on the cross-flow microfiltration of fine TiO_2 suspension system with ceramic plate membrane.Factors such as feed concentration,cross-flow velocity,trans-membrane pressure,acoustic intensity and ultrasonic frequency were studied.The ultrasonic enhancement factor and the ratio of removed cake layer by ultrasound were used to show the effect of ultrasound irradiation on membrane microfiltration processes.Primary mechanism of ultrasonic irradiation ...