A Cu-15Ni-8Sn(%,mass fraction) alloy was manufactured by spray forming.The microstructures were studied by optical microscopy(OM) and scannig electron microscopy(SEM).The mechanical properties were also tested.The results show that the microstructures in the bottom of the billet are quiet different from those of the central section of the billet.It is mainly α-solid solution in the central section of the billet.Porosity in the alloys decreases the density and mechanial properties.