Abstract: Hybrid nanofibers were fabricated by electrospinning a mixture of PVAc and Sn(OH)4 hydrosol (or mixed 1% TiO2 doping)in methanol/ethanol cosolvent. Light-catalyzed properties of different samples were analyzed through the degradation of methylene blue under UV-light. The morphology and Mechanical properties of the hybrid nanofiber and fibrous membrane were characterized by Scanning Electronic Microscope (SEM) and atomic force microscopy(AFM), respectively. Transmission electron microscope(TEM) were measured to assess the structure of the nanofibers. The study revealed that the photocatalytic activity of PVAc/SnO2 nanofibers were improved according the more SnO2 content in them. Especially when SnO2 content reached 30%, the degradation rate can be more than 95%.At the same time, the photocatalytic property also benefited from 1% TiO2 doping. After photocatalysis, the morphology of nanofibers were retained well, and the modulus of single nanofiber was decreased while the mechanical properties of fibrous membrane were increased.