Based on the analyzed data of δD and δ18O, the time sequences of δD and δ18O are established. The results show that these are an obvious positive correlation between δD and minimum air temperature, an obvious negative correlation between δD and relative humidity in Tamarix growth season; the correlation between δ18O and relative humidity are negative while the correlation between δ18O mean average air temperature are positive, vice versa. The correlation between δD or δ18O and precipitation are all negative.