Abstract: In order to adjust the crop and plant structure in Shenyang, to monitor and research chilling damage, and provide foundation for insuring safe food production, the author analyzed the change tendency and sudden change of thermal energy in nearly 60 a crop and plant’s growing season in Shenyang by utilizing the method of statistical diagnosis and analysis of climate. The result showed that: both of the average temperature in the 60 a crop and plant’s growing season in Shenyang and the active accumulated temperature which was greater or equal to 10℃increased dramatically, with climate trend rate 0.164℃/10 a and 51.52℃·d/10 a separately. The average temperature in nearly 30 a growing season rose by 0.6℃and the active accumulated temperature which was greater or equal to 10℃increased by 180℃·d. The signal-to-noise ration indicated that longsequence sudden change in climate between 1951 and 2010 was not obvious. With the moving average and the prolongation of years, there was a positive correlation between the average temperature in growing season and active accumulated temperature that was greater or equal to 10℃, which sustained an upward trend. The results had reference value to the rational use of heat recourse, planting structure adjustment, as well as making agricultural production projects arranged reasonably.