Relationship between variation characteristics of frozen soil and the influencing climatic factors were analyzed for the prediction of soil freezing and thrawing in Shijiazhuang.Based on the daily observation data of ground temperature,precipitation,evaporation capacity and frozen soil archived by 5 stations in Shijiazhuang from 1981 to 2010 and methods such as linear trend,multiple regression and complete correlation coefficient,variation relation between characteristics of frozen soil and the influencing climatic factors was analyzed.The results show that,the first freezing date of surface soil had a significant deterring trend while the first thrawing date of surface soil had a significant advancing trend with the middle area having the most significant trend.An obvious positive correlation existed between the average lowest ground temperature during November to December,and the first freezing date of soil surface,while an obvious negative correlation between the average lowest ground temperature during February to March and the first thrawing date of soil surface.Precipitation and evaporation capacity in autumn had weak effect on deterring the first freezing date of soil surface,so is the precipitation and evaporation capacity in winter effect on advancing the first thrawing date of soil surface.