According to the analysis of the cause of warm winter climate from the 1980s,it indicates that there is a 30-year periodic temperature transformation in China,the main factors which result in continuance warm winters in China,may be the outbreak of El Nino Event,the weaken East Asia winter monsoon,the strengthened subtropical high in the west Pacific Ocean,the diminished snow cover in Europe and Asia,the decreased volcano activities,and the impact of greenhouse.