GB/T 5080.2-2012 is a standard for the design of the test cycle in the reliability test. It focuses on how to scientifically plan the test duration and elaborates the design principles of the test cycle of different types of products. It is clear that when determining the test cycle, factors such as product characteristics, use environment and expected Reliability objectives need to be comprehensively considered. Through the specified method, the test time node and the number of tests can be reasonably arranged to obtain product Reliability data efficiently. This standard provides key guidance for product Reliability testing, helping enterprises to accurately evaluate product mass and enhance the competitiveness of products in the market.