Traditional life test to assess the reliability of electronic components take longer. How to quickly and accurately obtain the performance practice of electronic components and engineering tests on the urgent need to address the problem.In this paper, resistance-type humidity sensor as the research object, based on accelerated degradation test (ADT) reliability evaluation method, combined with maximum likelihood estimation and least squares method to solve the pseudo-failure life under accelerated stress distribution parameters, and draw reliability function under normal stress level.The results show that ADT can get accurate information about the reliability of the humidity sensor, shorten the test period, this evaluation method is also applicable to other electronic components reliability study, there is a wide range of application.