Abstract: The technology of radioactive aerosol capturing was the premise of radiochemical analysis of aerosol, helped to promote the development of aerosol radiochemical analysis. In this paper, by using a combination of different filtering materials and the construction of aerosol filter, radiochemical analysis aerosol sampling technique was discussed. Experiments show that: by the combination of sintered metal felt and high efficiency material, the efficiency can reach above 98%. The aerosol was generated by explosions of firecrackers for simulating sampling experiment. It is obtained that more than 100 mg particle size of aerosol 0.5 μm within 30 min, which fully meet the discharge of radiochemical analysis aerosol sampling requirements.