Teaching training of nuclear accident emergency practice is a key link in the training of emergency response capabilities at the nuclear accident site.In response to the characteristics and difficulties of traditional practical teaching in nuclear accident emergency response,a virtual reality-based practical teaching model is constructed,which contains elements such as practical teaching objectives,practical teaching conditions,practical teaching activities and practical teaching evaluation.Through specific teaching cases,we have studied and explored how to use the virtual reality-based teaching model in practical teaching.The results show that combined with immersive virtual reality technology,the vividness and realism of practical teaching and training have been greatly enhanced,and the effect of teaching and training has been significantly improved.