In the virtual experiment ,the learners in the completion of certain operations ,the computer determined to give targeted information and guidance ,called feedback .The article explains the concept of feedback ,feedback type ,the anal-ysis of feedback in the role of virtual experiments based on the proposed feedback design virtual experiments four factors that technical factors ,learner factors ,feedback factors and output interface virtual experiment teaching contents ,and va-rious factors specific explanation ,in order to provide for the research and application of reference and reference .%从反馈的概念、反馈的类型出发，分析了反馈在虚拟实验中的作用，提出了虚拟实验中反馈的4个影响因素：技术因素、学习者因素、反馈输出界面因素和虚拟实验教学内容因素，对各因素进行了具体的阐释，以期为后续相关研究与应用提供借鉴和参考。
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