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In this study,Cf/Al composites and TiAl alloys were joined by a new method named laser-ignited selfpropagating synthesis (SHS).Mixed powders of 63.0Ni31.9Al-5.1Ti (wt％) were used as joining interlayer.Perfect joint was got.The microstructure evolution and formation mechanism of the SHS joint were investigated by scanning electron microscopy (SEM),energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD).Results show that localized melting occurs on both sides.One γ-Nio.35Alo.30Tio.35 and two Ni-Al reaction layers form,respectively,in the TiAl/interlayer and Cf/Al/intedayer interfaces.The combustion of Ni-Al-Ti interlayer begins with the sharp reaction of Ni and Al.The interlayer product is a eutectic organization of NiAl and Al-rich γ.