Cr(VI)-contaminated soil is frequently encountered at abandoned industrial sites, posing a significant threat to surrounding ecosystems and human health. In this study, a novel of slag-phosphogypsum-based environmental material (SPEM) was developed using granulated blast furnace slag and phosphogypsum as raw materials under alkaline activation. Unconfined compressive strength tests, volume shrinkage tests, and toxicity leaching tests were conducted to evaluate the mechanical strength, volume shrinkage, and Cr(VI) ion leaching concentration of the solidified contaminated soil. Characterization ...