An experimental study on the in-siru preparation of MoSi2 and WSi2 composite was conducted by self-propagating high-temperature synthesis(SHS)with powder mixture of(Mo1-xWx)Si2(X=0.10,0.20,0.30,0.40).The phase and morphology of the synthesized products were investigated by X-ray diffractrometry and scanning electron microscopy.The results showed that the adiabatic temperature concerning the preparation of MoSi2-WSi2 composites decreases as the W content increasing,which influenced the synthesis process.