The invention belongs to the technical field of asphalt treatment, specifically, a modified asphalt stirring system. The modified asphalt stirring system comprises a shell, a wire-leading column, stirring units, chains, and lifting motors; the wire-leading column is located at the axes of the shell, the stirring units are connected to the wire-leading column in a sleeving mode, two sides of the stirring units are provided with sliding blocks, the sliding blocks are connected with the chains in a matched mode, the upper ends of the chains are connected with the lifting motors in a matched mode,and the lifting motors are used for moving the stirring units up and down; the stirring units comprise sliding blocks, lifting rings, plectrum plates, and motor modules; the motor modules comprise mounting bases, first motors, second motors, connecting shafts, frames, control electromagnets, and restoration electromagnets; the wire-leading column comprises an insulation column, a positive plate,and a negative plate; and the middle portion of a horizontal shaft is provided with a positive pole slip ring, a negative pole slip ring, a positive pole wiring ring, and a negative wiring ring. According to the modified asphalt stirring system, multiple motors are adopted to be stirred, the mixing efficiency is enhanced, through adopting two motors with different revolving speeds, the self-rotation of differential speeds can be realized, and energy consumption is saved.