Fiber reinforced silt ceramsite concrete (FSCC) is the concrete that natural aggregates are partially or completely replaced by silt ceramsite, while fibers are incorporated to enhance its mechanical properties. Orthogonal experiments on the strength of two kinds of FSCC were conducted in 2017. Effects of three factors on 28-day cube compressive & splitting tensile strength of polypropylene fiber silt ceramsite concrete (PFSCC) and steel fiber silt ceramsite concrete (SFSCC) were studied respectively. The experimental results revealed that the effects of aggregate replacement rate, water-cement ratio, and fiber content on the compressive strength of PFSCC decreased in turn. The effects of aggregate replacement rate and water-cement ratio on the splitting tensile strength of PFSCC were equivalent, while the effect of fiber content was the least. The influences of aggregate replacement rate, steel fiber content and water-cement ratio on the compressive strength of SFSCC decreased in turn, while the effects of water-cement ratio, aggregate replacement rate, and steel fiber content on the splitting tensile strength of SFSCC increased. The further variance analysis showed that water-cement ratio and aggregate replacement rate had evident effects on the splitting tensile strength of PFSCC. A few suggestions were made for configuring fiber silt ceramsite concrete.