目的 以奶品瓦楞纸箱的自锁底结构为研究对象，研究不同自锁底结构的力学特性。方法 以奶品礼箱为对象，设计6种不同自锁底结构、3种不同尺寸的18种瓦楞纸箱，根据国家标准，分别进行空箱抗压实验与95 cm的跌落实验。结果 空箱抗压实验结果显示，18种自锁底箱体能够承受的最大压力在1133~1437 N之间，其中2片粘合翼均在侧面板上的X2-0结构能够承受的最大压力最大，达到了1437 N；X2-5结构能够承受的最大压力接近X2-0结构，达到1421 N。6种不同自锁底结构的底面跌落数据显示，底面跌落时最大加速度均在51~59 m/s2之间，其中X2-0结构纸箱的薄弱角缩进尺寸最小，为11 mm。结论 对比了不同缩进量的6种自锁底结构的抗压和跌落试验结果，X2-5型具有较大的抗压性能和耐冲击性能。

The work aims to study the mechanical properties of the different bottom self-locking structures for milk corrugated boxes. 18 kinds of corrugated boxes were designed, including 6 kinds of different bottom self-locking structures with three sizes for the milk gift box. According to the national standard, empty container compression test and drop test at 95 cm height were conducted. The empty container compression experimental results showed that the maximum pressure of 18 kinds of bottom self-locking boxes was between 1133 N and 1437 N. X2-0 structure with two pieces of adhesive wings on the side panels could withstand the maximum pressure which reached 1437 N; the maximum pressure withstood by the X2-5 structure was closed to X2-0 structure's, which reached 1421 N. The bottom drop data of 6 kinds of different bottom self-locking structures showed that the maximum acceleration during bottom dropping was between 51 m/s2 and 59 m/s2, and the minimum indent value of the weak angle was 11 mm from the X2-0 structure. Based on the comparison on the compressive and drop test results of 6 kinds of bottom self-locking structures with different indent values, the X2-5 structure has larger compressive property and impact resistance.