Polytitanocarbosilanes(PTC) with different C content are synthesized by polysilane(L.PS),polyvinyl chlo-ride(PVC) and Ti(OBu)4.The syntheses,composition and structme of the PTC with rich carbon are studied and the in-fluence of PVC content on the syntheses,composition,structure and properties of PIC is discussed by IR,GPC,VPO,TG.From these precursors,Si-Ti-C-O fibers with specific resistance of 1 Ω*cm ～ 103 Ω*cm are manufactured by melt spin-ning,curing in air and sintering at high temperature.