为实现玉米秸秆纤维废弃物资源化利用，降低焚烧造成的环境污染，采用5%氢氧化钠（NaOH）溶液对纤维改性增强，研究纤维改性对碱矿渣胶砂凝结规律与抗压强度性能的影响，并与未改性纤维对比。结果表明：随改性纤维掺量逐渐提高，试件初凝与终凝时间逐渐缩短，流动性略微降低，而抗压、抗折强度表现为先明显增长后缓慢降低。随未改性纤维掺量逐渐增大，试件初凝与终凝时间先增大再缩短，流动性显著降低，抗压强度明显降低，而抗折强度略微增长。纤维改性后，表面杂质去除，粗糙度增大，与碱激发基体间的黏结能力增强，是力学性能明显提高与降低对流动性影响的主要原因。

In order to achieve the resource utilization of corn stover fiber waste and reduce environmental pollution caused by incineration, a 5% sodium hydroxide (NaOH) solution was used to modify and enhance the fibers. The effect of fiber modification on the setting law and compressive strength performance of alkali slag adhesive sand was studied and compared with unmodified fibers. The results show that with the gradual increase of modified fiber content, the initial and final setting times of the specimens gradually shorten, the flowability slightly decreases, and the compressive and flexural strength show a significant increase followed by a slow decrease. As the content of unmodified fibers gradually increases, the initial and final setting times of the specimens first increase and then decrease, the flowability significantly decreases, the compressive strength significantly decreases, and the flexural strength slightly increases. After fiber modification, surface impurities are removed, roughness increases, and the bonding ability between the fiber and alkali activated matrix is enhanced, which is the main reason for the significant improvement and reduction of mechanical properties and their impact on fluidity.