In this work,a series of samples of Mo(Si1-xAlx)2(X =0,0.1,0.20,0.30,0.40,0.50,0.60,0.70,0.80,0.90)were prepared by self-propagating high-temperature synthesis(SHS).The microstructure and phase constitution of the final products were investigated using X-ray diffraction pattern characterization(XRD)and scanning electron microscopy(SEM).It was found that,Mo-Si-Al ternary system of SHS reaction would occur no matter what was the addition of Al in this work.