The invention discloses an electrostatic spinning preparation method for a Sb2S3-C nanofiber. The method comprises the following steps: firstly, uniformly mixing N,N-dimethyl formamide with tetraethoxysilane, thereby acquiring a mixed solvent; adding SbCl3 and magnetically stirring till completely dissolving and acquiring a colorless transparent solution; adding polyvinylpyrrolidone and magnetically stirring, thereby acquiring a colorless transparent electrostatic spinning precursor solution; transferring the precursor solution into a medical injector for electrostatic spinning and then starting to spin on an electrostatic spinning device, thereby acquiring an aluminum foil for the nanofiber; drying an aluminum foil substrate loaded with the nanofiber, using a corundum ark for collecting the nanofiber, placing into a thiourea Ar-introduced tube furnace and performing vulcanization and carbonization treatment, thereby acquiring a black end product of Sb2S3-C nanofiber. The Sb2S3-C nanofiber prepared according to the invention is uniform in diameter within about 200-300nm and has excellent electrochemical properties.