The unprecedented disasters of low temperature, persistent rain, snow and ice st orms occurring in early 2008 in South China have exerted a significant social im pact, which causes great losses in Hunan and other provinces. The weather reason was analyzed by using conventional meteorological data, the atmospheric strati fication of freezing rain weather in Hunan was analyzed by using the L band radi osonde data and ground meteorological data at Changsha Radiosonde Station, and t he microphysical processes were simulated by using weather modification model. T h e analysis indicated that the freezing rain weather would form when the frontal inversion having a thicker melting layer （or higher temperature）and a thinner cooling layer（or not too lower temperature）constitutes a freezing rain strati fication.Mixing cloud precipitation is the main precipitation mechanism of the freezing rain, the threelayer model and the freezing rain st ratification could explain the entire mechanism and process of the freezing rai n formation completely and comprehensively. Further exploring the possibility of freezing rain suppression was carried out based on the ice crystal effect and explosion effect.