[en] The article describes the main point about overpressure accident analysis of the primary coolant system, the main steam system, containment system of nuclear power plant, involving the acceptance criteria, the initial boundary conditions and parameters, analysis scope, methodology and so on. It combines with the power plant license request and the latest research results, the specific principles of the requirements on the balance between interests and security around the nuclear power industry, outlining problems and solutions encountered in the review process. The aim is to explore how to further improve the overpressure analysis, promoting the power plant license requesting and review process. (authors)