Membrane filtration mechanism is one of the major study projects for membrane filtration process to be solved, its mathematical mode cannot be approached universely due to the complexity of filtration process and variety of feed liquid. With the view of ceramic membrane structure design, the physical relation between the water flow channel, in which such parameters as the channel diameter d, channel quantity N and distance between neighboring channels Lg are involved, and the structure parameters of Outside Diameter of the element D and the length of the element L will be studied, and the parameters Lg and d are considered to have significance in filtration features analysis of ceramic membrane element and determination of technological parameter.