To study the hydraulic properties of salinized soil improved by organic and inorganic soil conditioners in the Ningxia Diversion Irrigation Area, a salinized farmland was chosen for soil improvement and planting experiments. Soils improved by various conditioners were sampled from five layers for column infiltration tests in a laboratory. Soil water content and pressure head were measured with a pressure-membrane meter, and the infiltration coefficient was measured with a self-circulating Darcy infiltration tester. Based on the measured data, van Genuchten (VG) model was employed for inversion calculation of soil hydraulic characteristics, and soil water characteristic curves of each layer were comparatively analyzed after different conditioners treatments. The results showed that:①Soil water contents after improvement were generally greater than that of the control group, and especially, soil water contents improved by the organic conditioners were greater than those by inorganic conditioners at the same soil suction. ②Soil water characteristic curves and the parameters in VG model changed greatly after improvement compared with the control group. ③Soil bulk density improved with organic conditioners decreased obviously, but it changed unclearly improved by inorganic conditioners. ④Compared with the control group, the movement of wetting front and soil water infiltration coefficient increased to different degrees after improvement, which were better when improved with organic conditioners than by inorganic conditioner. In conclusion, soil conditioners can affect soil bulk density, water content, rate of soil water infiltration and other hydraulic parameters, indicating that they can change soil structure to a certain degree, organic amendments (cow dung and furfural slag) have better effects for soil properties than inorganic amendments (desulphurization gypsum and fly ash).