Abstract: Six kinds of technical measures(pruning, covering couch grass, mulching plastic film, sprinkling irrigation antifreeze etc.) were used to mountain tea plantations to improve the capacity of frost resistance and study the relationship between the enzyme activity of SOD, POD and freezing rates . The results showed that : (1) With freezing rates increase, the enzyme activity of SOD also increases accordingly, in a certain range to various technical measures. This is because tea plants have the self-repairing ability; (2)To mountain tea plantations, the technical measures used directly to crown of tea plant have better effect than used to environment and soil because of wind-chill effect. The result of six kinds of the technical measures is: mulching plastic film > covering couch grass > CK> no pruning>irrigating roots> spraying crown; (3) It's beneficial to tea plant to reduce freezing injury with suitable pruning in autumn.