Vacuum leaf filter, known as Moore filter in the world, is widely used in titanium dioxide and non-ferrous metallurgy industries. The vacuum leaf filter is mainly composed of filter leaf, vacuum piping system (vacuum suction pipe, valve and air bag, etc.) and frame. The filter body is composed of several (usually 6-30) filter leaves, the filter leaves are rectangular, and the number of filter leaves can be determined according to the filter area required by the process flow. The filter leaf is generally made of a plastic filter plate into a filter carrier, and a filter medium (filter cloth) is spread on its surface and fixed, which constitutes the basic filter element of the filter. The name of this equipment is taken as "leaf filter", which vividly highlights the basic function of the filter leaf, and "vacuum" reflects the function of suction and filtration of the filter leaf in the filter material. The production capacity and technical indicators of the vacuum leaf filter mainly depend on the basic filter elements of this group of filters. Obviously, the basic goal of the development of the vacuum leaf filter is first of all the development of this group of basic components, that is, the first development of the filter plate. Of course, the development of the leaf filter vacuum suction system is also an important sign of the continuous improvement of the equipment.