Abstract: The problem of dust removal from high temperature pyrolysis gas is one of the important reasons affecting the large-scale application of coal pyrolysis technology. According to the characteristics of the dust carried by high-temperature pyrolysis gas,the research progress of high-temperature dust removal technology of dust containing pyrolysis gas were analyzed,the characteristics of dust removal technology of high-temperature pyrolytic gas were discussed. According to the characteristics of high-temperature dust removal technology of dust containing pyrolytic gas,the future research direction of pyrolysis gas dust removal technology was prospected. The pyrolysis gas containing dust has the characteristics of complex composition,sensitive to temperature,easy condensation of heavy components,small particle size of dust and difficult separation. The cyclone separator is used for the dust removal of pyrolysis gas,and the dust removal efficiency of coarse dust with particle size greater than 10 μm is high,which is generally used as the pre-separator of pyrolysis gas dust removal. Electrostatic precipitator,metal microporous filter and granular bed filter have higher efficiency for dust with smaller particle size in high-temperature dust-containing pyrolytic gas,which are suitable for fine dust removal. The results of the pyrolysis gas dust removal technology show that if the filtration temperature is too low,the tar is easy to condense,causing the decrease of oil and gas yield. If the temperature is too high,the secondary reaction of the pyrolysis vapor will be intensified,which causes serious carbon deposition in the filtration process and affects the operation cycle of the dust collector. In terms of the dust removal efficiency of high-temperature dust containing pyrolysis gas,the metal microporous dust removal technology has the highest filtration efficiency,which is more than 99%. The filtration efficiency of granular bed filter for high-temperature pyrolysis gas is more than 90%. Affected by the temperature,the filtration efficiency of electrostatic precipitator is generally less than 90% when the temperature is higher than 400 ℃.In the same filtration time,the metal microporous filtration technology has the highest filtration pressure drop,the electrostatic precipitator has the lowest pressure drop,and the pressure drop of granular bed filter is between the two. Electrostatic precipitator technology has the characteristics of " double low" of pressure drop and filtration efficiency. Therefore,on the basis of optimization of process conditions,the development of new electrode materials becomes its development direction. Metal micropore filtration technology has the characteristics of high filtration efficiency and high pressure drop. The development direction of metal mesh technology is to develop low-cost,high temperature resistant,corrosion-resistant carbon deposition resistant materials,and regulate the structure and distribution of metal mesh. In the process of granular bed dust removal,there are some problems such as carbon deposition of filter material and secondary reaction of pyrolysis vapor. In the future,it will be an important research direction of granular bed dust removal technology to develop new dust removal filter material and achieve the integration of dust removal and quality improvement. In the process of dust removal of pyrolysis gas,various dust removal technologies have their own unique characteristics. Based on the advantages of the existing technology,it is expected to ensure the high efficiency and stable operation of the dust removal process through the technical combination. At present,most of the pyrolysis gas dust removal technologies are in the stage of pilot and demonstration projects. However,the pilot experiment has a short time and lacks long-term operating data. In the future,it is necessary to strengthen the research on the realization of engineering application of pyrolysis gas dust removal technology.