The invention discloses a method for improving aging resistance of oil slurry blended asphalt. The method comprises the following steps: (1) adding gasoline alkali waste and a mercapto compound into oil slurry for a hybrid reaction so as to obtain modified oil slurry; and (2) adding the modified oil slurry into melt-state asphalt stock for blending, thereby obtaining the oil slurry blended asphalt. The blended asphalt prepared by the method has a relatively high penetration ratio, and thus, the aging resistance of the asphalt is improved. According to the method, a way for application of oil slurry resources in asphalt is developed, and the improvement on utilization benefit of the oil slurry is facilitated. Meanwhile, an environment-friendly method for treating the alkali waste is found.