In order to definite the developmental threshold temperature and the effective accumulated temperature of the first generation of Chilo suppressalis Walker in central Jilin province, diapausing larvae was selected in the field on November, 2011 and tested in 4 constant temperature（30℃, 27℃, 24℃ and 19℃）with 70% relative humidity. The results based on least square formula showed that the developmental threshold temperature and the effective accumulated temperature of over-wintering larvae and pupa were（9.13±1.34）℃,（12.86±2.01）℃ and（422.86±15.46） day degree,（107.83±15.38） day degree. That of the first generation eggs and larvae were（2.64±2.13） ℃,（13.75±2.66） ℃ and（81.62±11.56） day degree,（322.5±21.88） day degree. Considering the results and the meteorological data during 2011 to 2012, the forecast was consistent with the realities of situation in 2011 and 2012.