For the issue of foils′ separation and dispersion, a dispersing experiment was carried out by using two materials (diameter of 49.5 mm, thickness of 0.15 mm, 1 g; diameter of 47 mm, thickness of 0.05 mm, 0.5 g). The experimental model, testing scheme were established and gridding method about digital picture was introduced. The high-speed digital photos were analyzed combined with statistical parameters. The dynamic process was displayed fairly consisting of cast, separation and dispersion with a mass of foils. The trajectory with velocity decrease and descent movement of plate was obtained. The dynamic characteristics of dispersing cloud were statistically analyzed. The results reveal the mass of foils separated from the tail of cluster due to the aerodynamic. The cluster separates into several parts which disperse scheduling. Each part shows a cone shape based on which a cone-shaped cloud dispersing model was established. The model described the expansion and movement of cloud effectively. 