The effects of vulcanization temperature and state on the properties of NR/BR blended tread rubber were studied.The results showed that when the vulcanization state was 90％～105％and the vulcanization temperature was 145 ℃,the vulcanization state had little effect on tanδ and wear re-sistance of vulcanized rubber at 60 ℃.When the vulcanization temperature was 155 ℃,the state of vulcanization had a greater effect on tanδ and wear resistance of vulcanized rubber at 60 ℃.At 145 ℃ vulcanized rubber had good wear resistance under harsh conditions,and at 155 ℃ vulcanized rubber had good wear resistance under normol conditions.When the vulcanization temperature was 155 ℃,the state of vulcanization could be controlled at 95％～100％,and the vulcanized rubber at 60 ℃ could reach the same level with 145 ℃ vulcanized rubber.
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