Porous metal material with high porosity is a new type of high quality metal material with advantages of both structure and function, which has many excellent properties such as high porosity, high specific surface area, high connectivity porosity, excellent electrical and thermal conductivity, etc, and has been widely used in manufacturing practice and scientific life. In this paper, the common preparation methods of porous materials with high porosity was reviewed, and the latest research on corresponding preparation methods of porous materials with high porosity were summarized. The advantages and disadvantages of some preparation techniques were analyzed and discussed,and the key points and difficulties in successfully preparing porous materials with high porosity were discussed. The application scope and advantages of different preparation techniques in the preparation of porous metal materials with high porosity were summarized. The research status of porous metal materials with high porosity in the application fields of filtration separation, biomedicine, battery and catalysis, sound absorption and noise reduction, high efficiency heat exchange and so on, was introduced. Finally,the existing problems in the production and preparation of porous metal materials with high porosity were pointed out and the future development trend was forecast．