With the rapid industrialization and urbanization, the demand for air quality management is more and more urgent. High temperature dust filtration is one important environmental management technology. Porous ceramics are used as filter materials in the field of high-temperature dust filtration because of their unique advantages such as high filtration efficiency, as well as high temperature stability, particle loss resistance, corrosion resistance and durability. This paper mainly introduced several common preparation techniques of porous ceramics, including the traditional organic foam impregnation method, foaming method, in-situ combustion method, pore-forming method and other new methods such as the template method, gel injection molding method, freeze-drying method, multi-component co-precipitation method and hydrogel method. The principle, advantages and disadvantages of these preparation technologies and their research status were described. The application of these technologies in the field of high temperature dust filtration was briefly reviewed. Finally, the application prospect of the porous ceramics in the field of high temperature dust filtration was prospected.