Abstract: 4,4'-diaminodiphenylmethane (DMA), 4,4'-diaminodiphenyl ether (ODA) and 3,4'-ODA aromatic diamine were mixed with the amino-end capped polysiloxane to polymerize with fluorine-contained aromatic dianhydride, which was terminated with 3-ethynyl aniline to obtain three telechelic ethynylphenyl terminated poly(imide-siloxane) (ATIS) resins. The structure, processability, curing behavior, thermal stability of different ATIS resins and friction properties of PTFE fiber cloth reinforced ATIS composites were studied. The results show that the prepared ATIS resins had good solubility in aprotic polar solvents with processing window of 40-60℃ and curing exothermal enthalpy lower than 250 J·g^-1; ATIS resin with 3,4'-ODA had the widest processing window, and ATIS resin with 4,4'-ODA had the lowest curing exothermal enthalpy. The mass residual yield at 800℃ of cured resin in N₂ was about 30%. The friction coefficient of PTFE/ATIS composites was relatively high in the initial wear stage, and dropped to below 0.15 in 30 min, and kept stable in 30-240 min; the friction coefficient of composite with MDA was higher than that of composites with ODA after 90 min.