Abstract: The storage life of the sealing diaphragm is required for up to more than ten years. In order to evaluate the storage life of the sealing diaphragm in a short time, a method for testing the accelerated storage temperature of adhesive sealed diaphragm, step temperature test and constant temperature test are presented in this paper. Through the experimental research and data analysis, the maximum temperature of accelerated storage test for the sealed diaphragm should not exceed the glass transition temperature; in the accelerated storage test of sealed diaphragm, there are two failure modes, aging rupture of plexiglass diaphragm or the diaphragm is debonded with the structural parts. This study provides an effective test method and temperature range for the accelerated storage test of the similar products.