外文摘要 This paper discusses the method of analysis of system common-cause-failure (CCF) and provides practical guidelines for analysis procedure. After the introduction of the definition of CCF and the analysis method, the paper displays the complete procedure of qualitative analysis and quantitative analysis.Aimed the systemic study of the analysis procedure of system CCF, based broadly research relative reports, this paper introduces the definition and the method of qualitative and quantitative analysis during chapter 2 to 4. At the later part, this paper displays the complete procedure of CCF analysis detailedly, from the gain of CCF data to quantitative analysis.This report displays the complete procedure of CCF analysis firstly, including qualitative analysis and quantitative analysis. About the gain of CCF data, this report indraughts quantitative defence matrix and make the data more fit with the character of system. The qualitative analysis gets cause defense matrix and coupling defense matrix. This report improves the traditional method of extended fault tree and introduce the new way of extended minimal cut-set. Additionally, this report describes a simple approximate quantitative method. The degree of CCF to system is gained by quantitative calculation.This paper is the first detailed and complete description for CCF analysis. It can be reference for the analyst of system reliability.