Abstract: Cold dew wind is a disastrous weather during the heading and flowering stage of double-cropping late rice, which is blocked by low temperature and increases the empty shell rate. In order to understand the current situation of cold dew wind research, inherit and improve the research results of cold dew wind, and provide reference for making breakthroughs, authors summarizes the main results of the cold dew wind research after analysis and combing of the cold dew wind literature.Abnormal atmospheric circulation is the basic reason of large-scale cold dew wind. Factors such as topography and altitude can cause small-scale cold dew wind.The damage of cold dew wind to late rice is mainly at the heading and flowering stage, followed by the booting stage.Most researches on cold dew wind indicators are based on field experiments, meteorological element simulation experiments, production practices, historical data, and literature analysis.The most widely used indicators are "cold dew wind grade" and "technical specifications for evaluation of rice cold damage".The method of weather science is a common method for forecasting cold dew wind. Mathematical statistics are indispensable in weather forecasting, and the application of new methods such as neural networks is a trend in weather forecasting.In the southern double-cropping rice area, the cold dew wind mainly occurs in mid-to-late September or after. Under the global warming, the first day of the cold dew wind tends to be delayed and the number of days decreases, but there are some cases where the first day advances and the number of days increases.Single point (station) observation and 3S technology are commonly used for cold dew wind monitoring.Reasonable arrangement of late rice sowing date, selection of low temperature resistant varieties and water temperature regulation are effective in preventing cold dew wind. In view of the main problems existing in the study of cold dew wind, such as incomplete index factors, inconsistent index standards, and unable to achieve the required accuracies of prediction, monitoring and evaluation, the main research directions in the future are prospected: Deepening the study of multifactor disaster mechanism and multi meteorological element index of cold dew wind, and constructing the index system; Make use of new technologies such as big data and artificial intelligence to strengthen the research on intelligent and accurate forecasting technology of agrometeorology; Strengthening the research on precision monitoring and evaluation technology integrating meteorological observation, satellite remote sensing and crop model; Paying attention to the research on the new law of cold dew wind under climate change; Carrying out research on disaster prevention and reduction technologies suitable for climate change and agricultural scientific and technological progress.

Key words: Cold dew wind, Southern China, Double-cropping late rice, Progress, Heading and flowering