Loess are widely distributed in Northwest China, where the environment there is complex. To improve the engineering properties of the soils met in site, lime treatment is commonly applied in the field construction in this region. However, lime-treated soils in site always present a serious degradation in strength, since they are exposed to the long-term changes in climate and environment. Water retention curve is essential to study the pore water movement inside soils and their hydro-mechanical behavior. This paper investigates the effect of temperature and curing time on the water retention curve of lime-treated loess by filter paper method. The water retention curve of lime-treated soil were measured in different temperature and curing times. The experimental results indicated that the water retention capacity of loess was effected by lime treatment over curing time curing time and temperature changes. The effect decreased with the moisture content dropping. The temperature effect gradually weakens with the temperature increases. Besides, the VG model was applied to model the water retention curve of loess. And the effects of temperature and curing time on the parameters of a, n, θs, θr are analyzed. The research results can provide useful information for the prediction of engineering properties and the selection of engineering parameters under different environments. The water retention capacity near 0℃ plays essential role in the study of engineering problems dealing with frost heave.