Increasing of temperature and precipitation has affected the ecosystem and development of agriculture and animal husbandry in north Xinjiang in recent years,thus it is necessary to analyze climate change and its attribution. Based on the monthly data of temperature and precipitation at 23 meteorological stations in north Xinjiang and the standard arctic oscillation (AO) index during the period from 1965 to 2012,the changes of temperature and precipitation and their response to AO were analyzed by using the methods of linear tendency estimation,cumulative departure,correlation analysis and wavelet transform analysis. The results are as follows: ① The annual temperature and precipitation in recent 48 years increased with rates of 0.41 ℃·(10a) ~(-1) and 11.26 mm·(10a) ~(-1). Abrupt changes of temperature and precipitation were obvious around 1988 and 1986 respectively. The temperature in spring,autumn and winter in north Xinjiang increased significantly after the abrupt changes,but its change was not evident in summer. Seasonal precipitation in north Xinjiang increased,especially in winter; ② There was a certain similarity in the change periods of temperature,precipitation in north Xinjiang and AOI,particularly there was a good correspondence between frequency domains of temperature and precipitation in winter and summer and AOI at the scale of quasi-3-year period; ③ There was a high correlation between winter temperature series in north Xinjiang and AOI,winter temperature and precipitation in north Xinjiang and AOI at multi-time scales were significantly correlated with a time lag of 0.5 - 1 year,indicating that AO has a real value to predict temperature and precipitation in north Xinjiang.