Abstract: Based on the climate data from 120 meteorological stations in east Inner Mongolia, Hebei Province, Shanxi Province, Beijing and Tianjin, the data of the initial day, final day and duration of stabile temperature over 10 ℃ were analyzed using the Kriging, anomaly analysis, wavelet analysis, [WTBX]etc.[WTBZ], the spatiotemporal change of accumulated temperature and the variation trend and range of air temperature in northeast China were researched. The results were as follows: ① The trend of climate change in northeast China was consistent with that of global climate change, and the warming extent was high; ② The Kriging was used to reveal that the areas sensitive to temperature change were located in northeast Hebei Province and east Heilongjiang Province; ③ The plot lines of initial day, final day and duration of temperature over 10 ℃shifted northward in varying degrees, temperature changed significantly in north Hebei, Heilongjiang and Jilin provinces, and the accumulated temperature increased markedly; ④ Temporally, the annual accumulated temperature increased markedly; ⑤ Extreme difference of accumulated temperature anomaly in recent 52 years was as high as 592 ℃, and climate change was significant; ⑥ In the whole study area, the growing season of crops prolonged gradually, which was advantageous for agricultural production.