Abstract: The paper aims to analyze the current situation of temperature changes in Liaoning Province.According to the meteorological data, such as annual average temperature, average maximum temperature, average minimum temperature and extreme maximum and extreme minimum temperature from 23 meteorological stations in 1958 to 2013 in Liaoning Province, The authors adopted the methods such as the climate tendency rate, moving average, Mann- Kendall mutation test and the inverse distance weighted interpolation (IDW) to analyze the characteristics of temperature change in recent 56 years in Liaoning Province. The results showed that the average annual temperature of Liaoning Province had an obvious rising trend on the whole, especially after 1990s, the increase of the average annual temperature trend was more significant. Affected by the latitude and the location of the land and sea differences and other factors, the spatial distribution of annual average temperature of Liaoning Province was gradually enhanced from northeast to southwest. In the whole time domain, average annual temperature fluctuations had a point mutation, which happened in 1988. And there were 3 main cycles, the first main cycle was for 12 a, the second and the third main cycle were for 21-22 a and 8 a respectively, all the main cycles had certain decadal variability.