Abstract: 【Objective】This study was to investigate the impact of biochar and river sand on the enhancement of saline soils in the Yellow River Delta region.【Method】A field experiment was conducted to analyze the spatial and temporal transport of soil water and salt,as well as the growth and yield of winter wheat in saline soils under the influence of biochar and river sand.The experiment consisted of seven treatments:CK （control）,S₁ （136 t/（hm~2·a） of river sand）,S₂ （272 t/（hm~2·a） of river sand）,S₃ （408 t/（hm~2·a） of river sand）,C₁ （5 t/（hm~2·a） of biochar）,C₂ （10 t/（hm~2·a） of biochar） and C₃ （20 t/（hm~2·a） of biochar）.【Result】Our results showed that treatment C₂ exhibited an average soil moisture content of 15.13%in the0～20 cm soil layer,while treatment S₃ displayed values of 17.35%and 20.53%in the 20～40 and 40～60 cm soil layers,respectively.Both biochar and river sand treatments can affect the distribution of soil moisture.Biochar primarily increased the water content in the surface soil,while river sand was more effective in increasing water content in the deeper soil layers.Concerning soil salinity,the application of biochar initially increased soil salinity,but it subsequently decreased after the revitalization stage.The average soil salinity was lowest in treatments S₃ within the 0～20 and 20～40 cm soil layers,and lowest in treatment C₂ within the 40～60 cm soil layer.Analyzing the change in salinity of winter wheat from the early fertility stage to harvest,the treatments with the highest reduction in the 0～20,20～40 and 40～60 cm soil layers were S₂（32.34%）,C₂ （29.86%） and C₁ （12.38%）,respectively.However,the river sand treatment resulted in salt accumulation in the 40～60 cm soil layer.The growth and yield of winter wheat indicated that both biochar and river sand promoted its growth and yield,with biochar being more effective in promoting the initial growth.Treatment C₂ yielded the highest winter wheat yield at 5 815.4 kg/hm~2,which was 20.46%higher than the control （CK）,while treatment S₃ yielded 5 795.1 kg/hm~2,both significantly higher than CK.【Conclusion】In conclusion,this study found that C₂ treatment was the most effective,followed by S₃ treatment,in enhancing saline soils.Therefore,the selection of an appropriate improvement method should be based on local conditions.