Abstract:

Based on the 11 stations data ,We labored the spatial feature an trend of frost for the past 50 years,The results indicate:The section feature of frost is obvios,The days without frost are 30 between the North and Sorth。The first frost is related obviously and the lastest frog is ahead.The days without frost are increasing because of the delay of the first frost.The age features of them are obvious.The first frost、the lastest frost and zero frost days occur a obvious turn for the past 50 years.