The invention relates to a titanium-silicon-carbon composite supercapacitor electrode material. ,belonging to the field of supercapacitors. The electrode material is composed of titanium silicocarbonand carbon fibers, wherein the titanium silicocarbon particles are embedded in a one-dimensional nanowire structure formed by carbon fibers. The preparation method of the electrode material comprisesthe following steps: (1) dispersing titanium silicocarbon powder in a mixed solution of ethanol and acetic acid, adding polyvinylpyrrolidone, preparing a spinning precursor, and electrospinning the precursor to obtain precursor; (2) preoxidizing the precursor of step (1) and performing carbonization treatment to obtain the precursor. The invention uses titanium silicocarbon as basic raw materialand adopts electrostatic spinning method to prepare titanium silicocarbon with one-dimensional nanowire structure. Carbon composites, which have good rate performance and cycle stability, can significantly improve the electrochemical performance of supercapacitors.