The guarantee-purpose safety cost,the cost of safety failure and the total cost in safety as the change law of the guaranteed safety level in the article have also heen analysed.

• 建立了建设项目安全成本的指标体系；分析了保证性安全成本、损失性安全成本及安全总成本随着安全保证度的变化规律；提出了建设项目安全保证度的概念；进而构建了建设项目安全成本率分析模型.