Abstract: In this study, Using the average temperature of ten days from 1961 to 2010, the corn heat indexes in Liaoning province are calculated. Based on the statistic analysis between heat index and atmospheric circulation data, the forecasting models the corn heat index is developed. The results show that the correlation coefficients between the predicted and observed values of heat index in these 5 corn-growing regions that is the east Liaoning, the south Liaoning, the west Liaoning, the north Liaoning and the Central Region during the period from 2000 to 2010 are 97.3%,95.4%,98.2%,97.5% and 98.5% respectively. The model can be used to forecast heat status in the growth and development period of corn in Liaoning province.