The paper introduces four kinds of bridge engineering collapse risk identifying methods of structural analysis method,accident summary method,professor survey method and field survey method,and analyzes factors leading to bridge engineering collapse accident from aspects of construction,materials,maintenance and natural disaster and so on,so as to puts forward major preventive measures.%对结构分析法、事故总结法、专家调查法、现场调研法四种桥梁工程坍塌事故风险的识别方法进行了介绍，从施工、材料、养护、自然灾害等方面分析了导致桥梁工程坍塌事故的主要因素，从而提出了主要的预防措施。
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