Abstract: A novel dual-phase (martensite plus bainite) wear-resistant casting steel for caterpillar band was designed and tested to overcome the shortcomings of high-Mn steel, such as the low mechanical properties especially the wear-resistant properties. The results showed that the microstructure of the specimens consist of martensite and bainite with the least amount of residual austenite after quenching tempering. With the increasing carbon content in specimen, its elongation and impact toughness tend to decrease, while the impact toughness remained increasing after quenching and tempering with increasing Cr content. Comparatively, the best mechanical properties belong to those specimens in which the carbon and chromium contents are 0.30% and 0.60%, respectively, with the bainite dual-phase structure. After the grinding test for 400 h, the casting steel specimens show the wearability which is 56% higher than high-Mn steel under dry friction conditions and 22.5% higher than high-Mn steel under wet friction conditions involving corrosive medium.