Abstract: The control of particulate matter from combustion sources has always been a key issue in the field of air pollution prevention and control. Particulate matter includes filterable particulate matter （FPM） and condensable particulate matter （CPM）. FPM refers to soot. Its control technology has become relatively mature and its treatment effect has reached the level of ultra-low emissions. CPM refers to substances that exist in a gaseous state in the flue and are converted into particles by cooling and condensation after discharge. Although CPM has not yet been included in the scope of mandatory governance, its environmental impact and potential hazards have been increasingly valued, and related research has gradually become a new hotspot. This paper systematically reviews the latest research progress of CPM in recent years: In terms of environmental impact, the latest quantitative analysis shows that CPM makes important contributions to organic aerosols and PM_2.5 in the atmosphere, and should be given sufficient attention; In terms of CPM measurement, although the existing impinger cooling method and dilution cooling method have undergone improvements, their equipment and operation are complex, the real-time data is poor, and there are many error factors, which seriously affect the convenience and accuracy; CPM online measurement technology has made breakthroughs, but further optimization is needed; The latest CPM emission data shows that the CPM emission concentration of some emission sources has exceeded FPM. CPM contains complex organic and inorganic components, and after condensation, it forms ultrafine particles; Research on the formation mechanism of CPM has made progress: elements such as sulfur, chlorine, and nitrogen in the fuel, as well as substances such as water vapor, sulfur oxides, and nitrogen oxides in the flue gas, affect the content of inorganic components in CPM, while the organic components of CPM are influenced by factors such as fuel characteristics, combustion conditions, and combustion adequacy; In terms of CPM control, a large amount of research has focused on the collaborative removal of CPM by existing air pollutant treatment equipment, and three CPM control methods have also been developed: flue gas cooling, adsorption, and fuel mixing. However, the efficiency of these methods needs to be improved. In the future, we should further explore the environmental impact of CPM, develop reliable CPM online detection technology, reveal the formation mechanism of CPM, develop efficient control technology for CPM, and comprehensively promote the theoretical research and engineering practice of CPM pollution prevention and control.