Abstract: In order to know the feature of frost event in the round, and provide more reference for agricultural fine compartment, the feature of frost event in Shanxi Province was analyzed by using minimum surface temperature data day by day of 70 meteorological stations, and applying linear trend and wavelet analysis method. The results showed that: (1) there had apparently spatial deference among the first frost, the last frost and the frost-free period. The earliest first frost differed the latest one about 79 days, the earliest last frost differed the latest one about 112 days, and there differed frost-free period about 282 days. (2) As a whole, the first frost occurred later, the last frost occurred earlier, while the frost-free period became longer. The later trend of the first frost was increasing after 1990s. There had apparent regional difference of the first frost and the frost-free period with decadal change, but the last frost not. (3) There had much scale feature of the first frost, the last frost, and the frost-free period. But they had apparent difference. There had different abrupt change in different time scale. (4) Serious frost disaster occurred 1960s and 1970s, the probability of serious last frost became increasing after 21 century. So only taking scientific compartment way, adjusting reasonably plant layout, people could improve the level of agriculture industry.