Abstract: A silicon-containing arylacetylene resin with cyano groups (CNSA resin) was formed by reaction of 2,6-bis-(4-ethynylphenoxy)-phenylnitrile polymerized with dimethyldichlorosilane by the catalysis of anhydrous zinc trifluoromethane sulfonate at room temperature. The structure and properties of the CNSA resin were characterized by ¹H-NMR, FTIR, DSC and TGA analysis techniques. The results show that the CNSA resin has good solubility and a wide processing window. The curing reactions of the CNSA resin take place at low temperature (<200℃). The cured CNSA resin has good heat resistance. There is no glass transition in the temperature range of 50−400℃. The decomposition temperature of 5% mass loss T_d5 is 512℃ in nitrogen. The flexural strength and the flexural modulus of T300 carbon fiber cloth/CNSA (CF/CNSA) composites are 383.8 MPa and 62.9 GPa at room temperature, respectively.