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.