The invention relates to an ultraviolet light-curable glass coating and a preparation method thereof. The ultraviolet light-curable glass coating is prepared from the following components in parts by weight: 30-50 parts of carbamic acid acrylate, 15-30 parts of (3) ethylene oxide trimethylolpropane triacrylate, 25-30 parts of dipentaerythrito five/six acrylic ester and 5-15 parts of a coating additive. The preparation method comprises the steps of firstly stirring and mixing the carbamic acid acrylate with the coating additive at 60-80 DEG C, and then adding the (3) ethylene oxide trimethylolpropane triacrylate and the dipentaerythrito five/six acrylic ester to agitate, so as to obtain the ultraviolet light-curable glass coating. The ultraviolet light-curable glass coating disclosed by the invention has good adhesive force and high hardness, is friendly to the environment and free of toxicity, and is especially suitable for surface coating of an optical fiber, so as to play a protecting role. The ultraviolet light-curable glass coating is simple in preparation method, low in cost and good in application prospect.