Fly ash is in short of supply.Research on how far stone powder replaced fly ash need to be done.With admixture dosage unchanged，fly ash was replaced by different content of stone powder.Compared with fly ash，the effect of fly ash-stone powder on roller compacted concrete(RCC)workability and strength were studied.Results showed that，RCC workability was improved by adding stone powder.RCC strength was reduced by adding stone powder.Compared with RCC compressive strength，Stone powder admixture had a greater impact on RCC splitting tensile strength.Mixed with 15% amount of stone powder and 40% amount of fly ash，RCC compressive strength could meet design requirements.Adding stone powder could reduce the waste of RCC compressive strength and could be an economic environment measure.