The risk matrix was used in risk zonation of cold injury to citrus in Hubei Province.The results showed that the method of risk zonation based on risk matrix was valuable and convenient to be applied in practical citrus production.Hubei Province can be divided into four risk levels.The first one is the no freezing damage zone including the Three Gorges Valley,valley basin and hilly region in southwestern Hubei Province and hilly area in northwestern Hubei Province.The second one is the low risk zone including Hanjiang River,Danjiang River Valley in the northwestern Hubei Province，Jianghan Plain,hilly area in the southeastern Hubei Province.In this zone,the cultivation of citrus is the main income.The third one is the moderate risk area including the major part of Jianghan Plain and the northwestern Hubei Province.In this area,citrus has 2-3 years’ experience of freezing injury every 10 years.Shennongjia forest region,the Wudang Mountains,Tongbai Mountains,the Dabie Mountains belonging to the high risk area is not suitable for cultivating citrus.