In order to study the terminal effect parameters of the natural shading including the number of debris-shaped systems, speed attenuation capability and intrusive ability, the paper builts the end-of-term damage model and gets the power parameters of the natural shading ranging 1~4 g, including the average wind-facing, resistance factor, attenuation factor, the speed of penetration for the limits of different aluminum plates, through the theory of analysis, test and verification. The results show that shape factor of the natural shading ranging 1~4 g is 4.96×10^-3 m²kg^-2/3; attenuation factor is 0.022 m^-1; resistance factor is 0.89; the consumed energy of encroaching each aluminum plate is 4.4×10⁸ J/m³.The establishment of the test method can refer to the study of the end point parameters about large natural shading, completes the damage model and supports for the number of supplies for fire planning and evaluation.