The invention discloses a zinc-oxide-based transparent conductive film and a preparation method thereof. According to the invention, prepared slurry is subjected to methods such as molding and cold isostatic pressing, such that a ceramic blank is obtained; a temperature increasing procedure of a sintering process is adjusted, such that a high-quality target material is obtained; and with a magnetron sputtering method, a titanium-containing co-doped zinc-oxide-based transparent conductive film is obtained. The obtained conductive film has high refractive index. When the film is applied in a silicon-based film soar battery, the matching degree with silicon film refractive index can be improved, light reflection at an interface can be reduced, and battery efficiency can be improved. With the titanium-containing co-doped zinc-oxide-based transparent conductive film preparation method, the raw materials are cheap, and the operation is simple. The method is suitable for large-scale productions, and has good application prospects in solar batteries and photo-electricity.