The invention relates to the field of optical tapes, in particular to a high-viscosity optical film tape and a manufacturing process thereof. The high-viscosity optical film tape comprises a light release film layer, an optical adhesive layer and a heavy release film layer which are arranged from top to down sequentially, wherein the optical adhesive layer is made of an adhesive, and the adhesive is,prepared from the following components in parts by weight, 30-50 parts of butyl methacrylate, 15-30 parts of ethyl acrylate, 10-20 parts of trimethylopropane trimethacrylate, 3-8 parts of crylic acid, 2-5 parts of melamine formaldehyde resin, 1-4 parts of triethylene tetramine, 1-5 parts of nano silicon dioxide and 0.5-2 parts of initiator. The components of the adhesives coordinate with one other, so that the prepared optical film tape has the advantages of high light transmission, high temperature resistance and high adhesive strength when used for bonding; in addition, the manufacturing process is simple, the production efficiency is high, the product quality is stable, and the overall performance of the high-viscosity optical film tape is excellent.