建设项目的劳动安全卫生预评价是在初步设计之前 ,对项目潜在的危险性、危害性运用安全系统工程和风险评估方法进行定性、定量分析和计算 ,得出系统发生危险、危害的可能性及危险、危害程度 ,由此提出切实可行的、合理的劳动安全卫生对策和建议措施 ,以求最低事故率、最低职业 Prior to preliminary design, pre-evaluation of occupational safety and health of construction projects involves qualitative and quantitative analysis and calculation of the potential risks of the project, application of safety systems engineering and risk assessment methods, and concludes the possibility of danger and harm to the system and Dangerous and harmful degree, thus put forward feasible and reasonable labor safety and health measures and recommended measures in order to achieve the lowest accident rate, the lowest occupation