Abstract: This study evaluates the effect of planting medlar on the sustainable use of secondary salinized land. The physical and chemical properties of secondary salinized soil were investigated under different land use patterns, including an abandoned field (AF), medlar fields with different planting years (MF) and a wheat field (WF). Compared to AF, the MF soils showed significant increases in organic matter, total nitrogen, available nitrogen, and HCO₃^-, while total salt content and electrical conductivity significantly decreased. The most significant decrease was in Na⁺ (70.1%-82.9%). Results also showed that in MF soils the sand content decreased and silt and clay content increased. CaCO₃ content increased and pH value decreased. However, bulk density firstly decreased and then increased over time, while porosity showed an opposite trend when compared with AF. K⁺ and total salt content were higher in MF than in WF by 118.1%-282.3% and 84.0%-211.5% respectively. Other soil physical and chemical properties showed no significant differences between MF and WF. The results show that secondary salinized soil quality is improved by planting medlar. Although Na⁺ content was significantly higher, other soil characteristics were relatively low compared to salinization of traditional cropland. The improvement of soil characteristics was rapid during the first 4 years of medlar planting and then slowed considerably. The study thus shows that changes in land use patterns greatly influence the soil characteristics of secondary salinized land.