GB/T 21223.1-2015 "Guidelines for Statistical Analysis of Aging Test Data, Part 1: Methods Based on the Mean Value of Normally Distributed Test Results" specifies statistical analysis methods for aging test data, which are applicable to the analysis of the average value of normally distributed test results. The standard includes numerical methods for data processing and statistical methods for hypothesis inspection, which are applicable to the analysis of complete and censored data sets. Through standardized data processing procedures, the standard provides a scientific basis for the reliable evaluation of aging test results and is widely used in the research and evaluation of material aging performance.