A bottom guard plate testing device for a battery pack is provided, which includes a pedestal (100) and a test mechanism (200). The pedestal (100) is configured to place a bottom guard plate (300), the pedestal (100) is provided with a measuring recess (110), a pressure sensor (400) or a plastically deformable member (500) is arranged in the measuring recess (110), and a cushion block (600) is arranged on the pedestal (100). The bottom guard plate (300) and the pedestal (100) are spaced apart by the cushion block (600) to form an impact cavity, and the measuring recess (110) is located in the impact cavity. The test mechanism (200) includes a test bracket (210) and an impact assembly (220), the test bracket (210) and the impact assembly (220) are arranged on one side of the pedestal (100), the impact assembly (220) is suspended on the test bracket (210), and the impact assembly (220) is located directly above the pedestal (100).
