The invention discloses a real-time fluorogenic quantitative PCR detection kit for type-I and type-II bovine viral diarrhea-diarrhoea virus and a special primer thereof and a TaqMan probe. The detection kit has advantages of simple operation, strong specificity, high sensitivity and good repeatability for BVDV detection. The detection kit can be used not only for identification of type-I and type-II bovine viral diarrhea-diarrhoea virus and hog cholera virus but also for accurate quantification of type-I and type-II bovine viral diarrhea-diarrhoea virus. The detection kit can be used in fields of detection of raw materials and semi-finished products in vaccine production and detection of dairy products, etc.