Risk assessment constitutes an important part in legally controlling of environmental release of transgenic organisms and is a core subject in biosafety research. The paper dealt with the description of the principles and general risk assessment model for the environmental release of transgenic organisms on the basis of analysing and comparing the various methods on risk assessment, in combination with the past research results of the authors. The model includes three stages from hazard identification, risk estimate through risk evaluation, which can be divided into seven steps.%风险评估是转基因生物环境释放依法管理的一项重要内容，也是生物安全研究的核心内容之一。本文在分析和比较国内外有关转基因生物风险评估方法的基础上，结合作者近年来对转基因生物风险评估的专题研究，对转基因生物环境释放风险评估的基本原则和一般模式进行了全面的描述。这种模式一般包括危险识别、风险估算和风险评价3个连续过程，并可分解为7个具体步骤。
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