Abstract：

Reviews the experimental studies on the characteristics of the aerosol droplet pollution sources in recent years. Presents the characteristic parameters of aerosol droplet pollution sources, including velocity and flow rate, angle and opening area, temperature, particle size distribution and concentration, when being injected into the room in different ways such as sneezing, coughing, talking and breathing. Analyses the influencing factors of the characteristic parameters, providing references for studying the propagation characteristics of aerosol contaminants in the room. Points out the current deficiencies of the experimental study on pollution source characteristics.