The invention belongs to the technical field of cable accessories and particularly relates to an insulating water-blocking tape special for a submarine cable and a production method thereof. The insulating water-blocking tape comprises a base fabric, wherein the surface of the base fabric is coated with a first water-blocking adhesive layer, the surface of the first water-blocking layer is provided with a super absorbent resin layer, and the super absorbent resin layer is bonded with a surface layer through a second water-blocking adhesive layer. The base fabric of the insulating water-blocking tape is formed by weaving polyester fiber mesh cotton and polyester filament yarns, so that the base fabric is good in water permeability and high in tensile strength. A water-blocking adhesive is coated before the base cloth is sprayed with powder, so that the content of a water-blocking component is increased, powder removal is prevented, and the situation is avoided that the water-blocking powder can fly all around in a workshop during high-speed wrapping; the liquid water-blocking adhesive is used for sealing a base fabric net opening with high air permeability, and after meeting water,the super absorbent resin can be quickly and directly in contact with water to quickly expand; a bonding effect with the super absorbent resin can also be played, and the amount of the sprayed water-blocking powder is increased and the effect of bonding with the base fabric is improved.