事故树分析是安全系统工程最重要的分析方法之一，它能对各种系统的危险性进行辨识和评价，不仅能分析出事故的直接原因，而且能深入地揭示出事故的潜在原因。用它描述事故的因果关系直观、明了，思路清晰，逻辑性强，既可定性分析，又可定量分析。基于可视化理论和技术，建立了事故树可视化模型，确定了系统功能目标，完成了系统结构设计，构造了事故树图形生成与事故树动态分析于一体的集成分析环境，开发出事故树计算机分析系统，为事故分析和安全评价提供高效、准确的技术和方法。

The Fault Tree Analysis (FTA) is one of the most important methods in the safety system engineering. With FTA, the fatalness of the various kinds of system can be distinguished and evaluated, not only the direct causes of the accidents but also the potential causes can be deeply opened out. The consequences of accidents described with FTA are intuitional, intelligible, clear thingking and logical. The FTA can finish the qualitative analysis and the quantitative analysis. In this paper, the model of the Fault Tree visulization system is established based on the theory and technology of the visulization, the system functions are determined, the design of the system structure is finished and the FTA visulization system is developed. Furthermore, the integrated analysis environment that conbines the Fault Tree graph creation and Fault Tree dynamic analysis is constructed based on computer. The FTA visualization analysis system supplies high efficiency and correct technology and measures for accidents analysis and safely assessment.