A research framework of application-oriented ceramic membrane design was proposed. The effects of membrane pore size distribution and particle size distribution of suspension on filtration were analyzed. In this work a blocking factor(k) was given to describe membrane fouling and a new crossflow microfiltration model of particle suspensions was built. This model discovers the correlation between membrane permeability and microscopic material structure

by which the variation of permeate flux with filtration time would be obtained and the influences of membrane structure parameters on permeate flux could be predicted.The model calculation showed good agreement with the experimental results.