Under climate warming,studying the response of agricultural thermal resources to climate change in northeast China still has important practical significance. Based on the daily meteorological data of 64 stations from 1961 to 2010 in northeast China,as well as generally accepted indices of agricultural meteorology,the spatiotemporal variation characteristics and evolution trend of agricultural thermal resources passing stably the daily average temperature 10℃ with 80% guarantee rate were analyzed. The responses of agricultural thermal resources passing stably the daily average temperature 10℃ to climate change in northeast China over the past 50 years were further explored. The results showed that the agricultural thermal resources in northeast China displayed decadal changes. Further,the agricultural thermal resources were found to be the fastest increase in the period of 1980s and 1990s. With the year of 1980 as a boundary,the initial dates were postponed and then advanced from 1961 to 2010,and the final dates were postponed. However,the duration days were shorten and then prolonged. The accumulated temperature was continuously increased; the agricultural thermal resources in northeast China were significantly increased in rerent 50 years. The geographical differences of the agricultural thermal resources in northeast China were significant. Especially,the agricultural thermal resources were found rich in the western and southern Liaoning Province,and lack in the Daxing'anling region of Heilongjiang Province. Moreover,with latitude increase from the south to the north,the initial dates were postponed,and the final dates were advanced. The duration days and the accumulated temperatures also decreased.