Abstract: Rice blast severely affects rice production in east Heilongjiang. The fixed-point investigation and periodic investigation were carried out in 2004-2013, and meteorological factors were collected during the infection of rice blast, the relationship between meteorological factors and rice blast disease index were studied by path analysis and stepwise regression methods. The results showed that: the average temperature in July and August was the predominant influencing meteorological factor on rice blast occurrence, and a short- term predicting model was built as:Y =-85.171163+0.41315X 1 +1.23231X 2-0.1817X 4-0.09418X 5 +0.167333X 6 + 0.178722X 7 +0.03334X 8 +0.04305X 9. With the above equation, regression fitting was carried out for 2004- 2013, and the result was good. The equation can be applied to middle and short-term prediction of rice blast occurrence in east Heilongjiang.