Abstract: Bending properties of steel fiber reactive powder concrete under different corrosion conditions were studied by four-point bending test. Experimental results show that the corrosion of chloride salt coupling freeze-thaw cycles is greater than the freeze-thaw cycles. After 1500 times chloride salt coupling freeze- thaw cycles, bending strength of the specimens was only about 45.02% of the standard curing. Because of the compactness of reactive powder concrete, external steel fiber corrosion but the internal steel fiber can still restrict the development of cracks. Therefore, the relative residual strength of the bending specimen can keep over 80%, which shows that it has good load capacity after the matrix cracking.