Method for directly producing road asphalt by mild cracking super-heavy crude oil

The invention discloses a method for directly producing high-grade road asphalt by super-heavy crude oil, comprising the following steps: the super-heavy crude oil is heated by a heat exchanger and then enters a dehydrating tower, then enters a heating furnace after a small amount of water-containing gasoline is separated by the dehydrating tower; after being heated to 380-430 DEG C, the super-heavy crude oil is heated by the heating furnace, then enters a mild-cracking reactor and stays in the reactor for 20-120min; the viscosity of the super-heavy crude oil is controlled to be 100-600mm /sat 100 DEG C after mild cracking; and the super-heavy crude oil after mild cracking enters a distillation tower, the temperature is controlled at 410-430 DEG C to separate gasoline, diesel oil and gas oil, and then the high-grade road asphalt is obtained. The yield of light weight oil is increased to 18%, the flash point of asphalt is enhanced to 245 DEG C, the evaporation of asphalt is reduced by 0.8%, the paradox between small needle penetration and high soft softening point of asphalt can not occur again, and all performance indexes of asphalt can meet GB/T15180 index.