The modified high-viscosity asphalt has raw materials of a base asphalt mixture, an oil slurry, a rubber modifier, modified petroleum resin, an anti-stripping agent, and carbon black powder. The road asphalt patching tape has good high-temperature performance, excellent wear resistance to wheels, a very high friction coefficient and good low-temperature ductility. The road asphalt patching tape can be closely attached to and effectively repair the diseased road surface. In this way, the road asphalt patching tape is compactly connected to the diseased road surface, which can strengthen the diseased road surface, strengthen the overall strength of the cracked area, and prevent diseases, such as turtle shell-shaped cracks, pitted surfaces or the like, from deteriorating into potholes or the like.