Device and method for testing sealing performance of hard packaging container based on vacuum degree attenuation

The invention discloses a method and a device for testing the sealing performance of a hard packaging container based on vacuum degree attenuation. The method comprises the following steps: S1, determining a judgment threshold value of a leakage rate for judging whether a sample packaging container is well sealed or not; s2, preparing a sample; s3, verifying the sample prepared in the step S2 by a test method; s4, testing the sealing performance of the to-be-tested sample packaging container, comparing a measured value with a judgment threshold value, and if the measured value is smaller than the judgment threshold value, judging that the sealing performance of the to-be-tested sample packaging container is intact; if the measured value is greater than the judgment threshold value, judging that the sealing performance of the packaging container of the to-be-detected sample has a leakage phenomenon; the testing device comprises a differential pressure gauge for measuring the vacuum degree in the packaging cont