介绍了用标准时间间隔发生器检定秒表时 ,测量结果不确定度分析和评定过程 ;讨论了测量不确定度的几个主要来源 ;通过一组实例 ,给出了秒表检定不确定度的分析和评定结果 ,该过程和结论可应用在对于计量标准进行相应指标的不确定度分析上 ,也可用于估计秒表检定本身的不确定度 This paper introduces the analysis and evaluation process of the uncertainty of the measurement results when the stopwatch is calibrated with a standard time interval generator. The main sources of measurement uncertainty are discussed. The analysis of the uncertainty of the stopwatch verification is given by a set of examples The results of the assessment, the process and conclusions can be applied to the measurement of the corresponding indicators of the uncertainty analysis can also be used to estimate the uncertainty of the stopwatch verification itself