2015年将达到40537MW。In view of the limitations in single prediction models and linear combined prediction model，nonlinear combined prediction model for total power of agricultural machinery was put forward on the basis of establishing single prediction models for total power of agricultural machinery in Heilongjiang province. The results of error analysis showed that mean absolute percent error of proposed nonlinear combined prediction model was 3.03%, which was lower than 6.26%,4.65%,4.88% and 3.72% of one-variable liner regression model, exponential model, GM（1，1）model and cubic exponent smooth model, and a little higher than 2.86% of the linear combined prediction model based on the minimum sum of error square. Predicting total power of agricultural machinery from 2006 to 2008 proved that this prediction model could efficiently improve prediction accuracy for total power of agricultural machinery. The total powers of agricultural machinery were predicted from 2009 to 2015 in Heilongjiang province. The prediction results showed that total power of agricultural machinery would maintain swift growth tendency in the future several years, it would be 40537MW in 2015.