Granite　stone　powder　is　a　common　type　of　stone-product　industrial　waste　spreading　over　Fujian　Province　and　other　areas　of　China,　causing　serious　environmental　problems.　This　paper　investigates　the　possibility　of　using　granite　stone　powder　to　completely　or　partially　replace　quartz　powder　for　preparing　＂Green＂　or　＂Eco＂　ultra-high　performance　concrete　under　autoclave　curing　regimes.　The　mechanical　properties　and　microstructure　of　autoclaved　ultra-high-performance　concrete　(UIIPC)　mixed　with　different　replacement　ratios　of　granite　stone　powders　were　tested.　It　was　found　that　its　mechanical　properties　still　satisfied　the　original　requirements　even　after　total　replacement　of　quartz　powders　by　granite　stone　powders.　Despite　of　a　slight　decrease　in　flowability　after　total　replacement,　flexural　and　compressive　strength　did　not　change　significantly.　The　hydration　product　of　flaky　tobermorite　crystal　was　found　in　both　granite　stone　powder　blended　UHPC　and　in　quartz　powder　blended　UHPC,　while　the　Ca/Si　ratio　varied　slightly.　Furthermore,　the　pore　structure　of　unadulterated　UHPC　improved　due　to　a　larger　population　of　harmless　and　less-harmful　pores　after　quartz　powder　were　replaced　by　granite　stone　powder.