Based on observed data from 71 meteorological stations in Northeast China from 1961 to 2012, the variation of temperature and frost-free period in decade scale, annual scale, month scale, and ten-day scale, were analyzed.The results showed that both contour lines of temperature and frost-free period moved northward in decade scale, and maximum value occurred in 1980 - 1999.Compared with 1961 - 1979, contour line of 3 ℃ temperature moved northward about 1 latitude, and the area of temperature over 3℃ increased 1.14 * 10~5 km~2, and contour line of 155d frost-free moved northward about 2-4 latitudes, and the area of frost-free 155d increased 2.02 * 10~5 km~2.The average temperature increasing rate in Northeast China was 0.30℃·10y~(-1), and maximum increasing in winter at the rate of 0.47℃·10y~(-1).The frost-free period increasing rate was 3.5d·10y~(-1), and first/latest frost date delayed/advanced 8.1d and 9.8d, respectively.The temperature increasing rate in February was 0.8℃·10y~(-1), which was key factor to large temperature increasing in winter.In which the final 10 days in February temperature increasing rate was 1.00℃·10y~(-1).Climate warming might have some impacts on agricultural production and agro-climatic zone in Northeast China, the results could provide references for heat resources utilization and crop cultivation under climate change.