The improvement of saline-alkali soil is a crucial task for farmland protection and sustainable utilization in Northwest China. In this study，five saline-alkali soil amendments，Hekang，Mianshengeng，Sodic Alkaline，Yandibao， and Kejianbao were selected. Through two-year consecutive field positioning experiments，the amelioration effects of these amendments on saline-alkali soil and their impacts on maize yield were investigated，aiming to provide a theoretical basis for selecting suitable saline-alkali soil amendments for maize fields in the Hexi region. The results showed that:(1)The application of soil amendments effectively improved soil physical properties. Among them，Mianshengeng soil amendment demonstrated outstanding performance，achieving a 13.48% reduction in soil bulk density，along with 12.83%，15.32%，and 14.07% increases in soil water content，porosity，and >0.25 mm aggregates，respectively，compared to the control without amendment application.(2)Amendments effectively reduced soil pH and water-soluble salt content while increasing the contents of organic matter，alkali-hydrolyzable nitrogen，available phosphorus，available potassium，and cation exchange capacity. Compared to the control，soil pH decreased by 3.25%-6.25%，water-soluble salt content decreased by 19.24%-56.27%，while organic matter，alkali-hydrolyzable nitrogen，available phosphorus，available potassium，andthe contents of increased by 5.59%-17.10%，11.69%-27.65%，1.31%-80.87%，3.54%-36.61%，and 0.76%-5.11%，respectively. The Mianshengeng treatment exhibited significantly better comprehensive improvement effects than other amendments.(3)Amendments effectively enhanced ear characteristics and increased grain yield. The five amendments achieved an average yield increase of 4.31%-15.03% over two years，with Mianshengeng amendment showing the highest yield improvement. In summary，under the experimental conditions，the Mianshengeng soil amendment effectively regulated soil physicochemical properties and nutrient availability，promoted maize growth，and significantly increased grain yield. It can serve as a priority option for saline-alkali soil improvement in the Hexi region.