Soil water characteristic curve of loess is closely related to its strength, seepage and constitutive simulation. This study tested soil water characteristic curves of intact and remolded Q3 loess. The classical B-C model and V-G model were used to fit the test results, and the effect of void ratio to soil water characteristic curve of Q3 remolded loess was analyzed. The results showed that soil water characteristic curve of intact loess is divided into three stages: the rapid decreasing stage, the slow decrease stage and the stable stage. When air suction value was about 20 kPa, air began to fill into the pore with the internal soil with drainage, and air suction increases gradually, stable stage of soil saturation is very low, the soil in the large suction pore drainage is not obvious. The overall trend of remolded loess consistent with the curves of intact loess, but the effect of void ratio on the soil water characteristic curve is larger, when the pore is relatively large, the initial volume of high water content, low suction volume water content decreased significantly with increasing suction, the pore is small, relatively small volume of the initial moisture content, with suction value increases, volumetric water content decrease rate is smaller; by using the B-C model and the V-G model of intact loess and experimental results were compared, results in low suction B-C model and difference test. However, the B-C model of high suction section is in good agreement with the experimental results. The overall fitting effect of V-G model is good. Especially in the low suction section, the fitting effect is better than the B-C model.