Abstract: The writing of failure analysis reports, is through objective and scientific explanation and demonstration of failure events and using logical reasoning and scientific demonstration methods such as concept, judgement and proof to analyze and evaluate the failure phenomena and various physical and chemical test results comprehensively, and finally to obtain the root causes and failure mechanism of the failure. The language characteristics, thinking ways, demonstrating methods, writing skills, and general requirements and basic contents of the failure analysis reports were explained in the process of writing the failure analysis reports, and the arrangement and contents of the failure analysis reports were introduced in the form of practical examples.