Polytitanocarbosilanes (PTC)，the precursor of SiC fiber containing Ti，has been synthesized directly from polysilane (PS) and titanium tetrabutoxide (Ti(OBu)₄) without using any reaction promoter. In this reaction，PS was decomposed into polysilane of low molecular weight (LPS) containing Si-C skeleton and Si-H bonds. Then PTC was obtained by the reaction of Si-H bonds in LPS with Ti(OBu)₄ accompanied by the conversion of Si-Si skeleton in LPS into Si-C skeleton. In this paper，the synthesis process and structure of PTC-Ⅱ prepared by this new method，compared with PTC-Ⅰ obtained by old method，and the properties of SiC fiber containing Ti using PTC-Ⅱ as the precursor were examined and discussed.