Abstract: In this paper, freezing factors in the statistics model of frost heaving deformation were improved through the mechanism analysis of frost heaving deformation of concrete dams. The factors group consists of two kinds of factors, they are period function factors of given period and given initial angle and air temperature hysteresis effect factors. The improved models were used in the analysis of crest displacement of Fengman dam. It showed that newmodels have four advantages as following: a) they are better than traditional ones in terms of fit goodnessZ b) they have clearer physical meaning so that they can be used to explain ″two- peak″phenomenon in the past yearsZ c) they can be used to directly analyze the effect of the seasonal frost heaving and to estimate the varying scopeZ d) the reservoir- level component or the time component is close to that in traditional model. Totally, the newmodel is effective. This method can be used for analysis of frost heaving deformation of concrete damlike Fengman dam, as well as for aging evaluation.