［Objective］Contour Reverse-Slope Terraces（CRT）are ecological engineering measures designed to mitigate soil and water loss on sloping farmland. This study aimed to explore and evaluate the improvement effects of CRT on the quality of red soil on slopes，and to provide a reference for selecting suitable soil and water conservation measures and improving soil quality in sloping farmland in the region.［Methods］Using sloping farmland in the Yizhe watershed Songhua dam in Yunnan as the study area，16 soil indicators were measured to analyze the differences in soil physical，chemical，and biological properties between control（CK）and CRT-treated sloping farmland. A minimum data set（MDS）was established to evaluate soil quality.［Results］1）In sloping farmland with CRT measures，the soil water content，geometric mean diameter，and total aggregates increased by 79.30%，11.36% and 11.43%（p<0.05），while soil bulk density decreased by 15.09% compare to those in sloping farmland of CK（p<0.05），respectively. 2）In sloping farmland with CRT measures，the soil total nitrogen，nitrate-nitrogen，total phosphorus，and total organic carbon contents increased by 33.34%， 112.58%，25.86% and 66.14%（p<0.05）compare to those in sloping farmland of CK，respectively，indicating effective nutrient retention by CRT. 3）In sloping farmland with CRT measures，total glomalin（T-GRSP）， easily extractable glomalin（EE-GRSP），leucine aminopeptidase（S-LAP），and β-1，4-N-acetylglucosidase . （S-NAG）increased by 17.45%，111.11%，92.57% and 307.36% compare to those in sloping farmland of CK （p<0.05）. 4）Three indicators，including high easily oxidizable carbon（H-EOC），S-NAG，and EE-GRSP， were identified as the main indicators for soil quality evaluation in the minimum data set. The verification of total data set suggested that the minimum data set reflected the effective information and accuracy evaluation for soil quality.（5）Overall soil quality l was ranked as CRT>CK，with the soil quality index of CRT sloping farmland increasing by 146.28%-266.34%（p<0.05），compared to that of CK.［Conclusion］CRT measures make the soil quality of sloping farmland below the terrace better than that above the terrace，elevating the soil quality below the terrace from a relatively low level to a high level. In conclusion，the implementation of CRT measures significantly improves the soil quality and productivity of sloping farmland.