In order to achieve a rapid improvement of saline-alkali soils and build up a desalinated and fertile plough layer in the Hetao Irrigation District，Inner Mongolia，two calcium-based amendments were prepared with flue gas desulfurization gypsum furfural residue and (amendment GF) or humic acid (amendment GH) based on the mass ratio of 2∶3.Thereafter，a field plot experiment was conducted to investigate the effects of two calcium-based amendments on soil salt cations，organic matter and nutrient issues，and seed yield of sunflower.Seven treatments were designed including no amendment control (CK)，and mixed amendment GF or GH with topsoil (0 ～20 cm) at application rates of 15，30 and 45 t/hm²，respectively.Compared with CK，all the treatments applied amendment GF or GH significantly decreased the pH value and sodium adsorption ratio at the depths of 0 ～ 40 cm.However，the amendment GF or GH treated soils had higher values of total dissolved solids at the 20 ～ 40 cm depth，particularly in the treatments with an amendment of 45 t/hm².In the topsoil layer，all the amendment treated soils significantly increased soil organic matter than that of CK.In addition，the treatments applied amendment GF significantly increased the concentrations of available phosphorus and ammonium nitrogen，whereas the treatments applied amendment GH significantly increased the concentrations of available potassium in topsoil，respectively.Significantly higher seed yield of sunflower was harvested in the treatments applied amendments than that of CK.The difference in sunflower yield among the treatments was mainly caused by the changes of topsoil pH，available phosphorus and ammonium nitrogen.In the circumstance of applying the same amount，the amendment GF treatments had less affected by saline-alkali stress and high nutrient than the amendment GH treatments，which contributes to a high sunflower yield.The above findings suggest that the application of amendment GF with a dose of 15 t/hm² can achieve a shortterm effect on decreasing salinity and alkalinity，increasing soil fertility and sunflower yield，which can be widely used in the Hetao Irrigation District and other similar ecological areas.