The composition of gas in the iron and steel industry is complex，and pollutants such as fly ash，NOx and dioxin are common，and its requirements for gas treatment units are getting higher and higher. Catalytic filter bags are capable of treating multiple contaminants in the same reactor，making it a breakthrough in collaborative removal technology. The integrated catalytic filter materials for dust removal，dust removal and denitrification and dust removal dioxin removal are focused on，and the research status of various catalytic filter bag technologies is expounded. In order to solve the problem of insufficient bonding strength between catalytic components and filter bags，on the one hand，it is necessary to improve the loading method，such as using the in-situ growth method and the optimized coating method，among which the in-situ growth method has outstanding effect and higher loading uniformity，which is one of the potential loading methods. On the other hand，it is necessary to treat filter bags，such as film lamination，filter material pretreatment，etc.，these two methods can also improve the anti-poisoning performance of catalytic filter bags; however，in order to solve the problem of easy poisoning，it is necessary to focus on the optimization of catalytic material components. In view of the difference between the temperature window for the removal of multiple pollutants and the tolerance temperature of the filter material，replacing the P84 material filter media is a better solution at present. With the development of materials science，more high-temperature resistant material filter media will emerge. The purpose of this paper is to bridge the gap between the current technology and the actual needs，and to provide a boost for the commercial application of catalytic filter media in the collaborative removal of multiple pollutants.