目的 为促进缓冲材料的组合应用，对材料不同组合形式的等效缓冲性能进行研究。方法 利用缓冲包装设计的理论和知识体系进行公式推导。结果 叠置及并置组合后，等效缓冲系数取值区域介于2种组合材料缓冲系数之间；组合等效缓冲系数公式以不同材料的缓冲性能参数及比例参数表达。结论 推导过程没有对材料模型进行假设，该组合等效缓冲系数公式具有较强的普适性。该等效缓冲系数公式的提出为组合缓冲衬垫设计及不同种类缓冲材料的合理使用提供了依据。

The equivalent cushioning property of different combination forms is studied in order to promote the application of combination cushion. Theoretical derivation was carried out based on the theory and knowledge system of cushioning packaging design. The equivalent combination coefficient value was between the coefficients of the two combination materials. The equivalent cushioning coefficient formula was expressed by cushioning property parameters of the two combination materials. In conclusion, hypothesis has not been made in the derivation process. The combination equivalent cushioning coefficient formula has strong universality. It provides a basis for the design of combination cushion and the reasonable use of different cushion materials.